FINAL TEST AT LABORATORY
Study of the diffusion in gaseous state and molecular speeds

1. We may say the followings:
   1. the molecules have speeds in all gaseous, liquid and solid states;
   2. the kinetic energy of a molecule is affected by temperature only;
   3. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   4. the molecules have energy in all gaseous, liquid and solid states;
   
   
2. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the speeds ratio;
   2. to keep us busy;
   3. extracting the information necessary to calculate the diffusion coefficients;
   4. synchronization of the diffusion times;
   
   
3. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all are moving in the same direction;
   2. all have same speed;
   3. are considered to be at the same temperature, but may have different energies;
   4. are considered to be at the same temperature, but may have different speeds;
   
   
4. The position of the ring in the experiment is dependent on:
   1. the width of the tube and not of the length of the tube;
   2. the concentrations of the solutions used;
   3. the length of the tube and not of the width of the tube;
   4. the mode energy or mode speed of each involved species;
   
   
5. The time to the formation of the ring in the experiment is dependent on:
   1. the real speeds and not the virtual speeds of each involved species;
   2. the propagation of the species as ions and not as neutral molecules;
   3. the length of the tube and the width of the tube;
   4. the speed of diffusion of each involved species;
   
   

TEST DE FINAL DE LABORATOR
Studiul difuziei in stare gazoasa si a vitezelor moleculare

1. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   2. energia cinetica a unei molecule este afectata de numai temperatura;
   3. energia cinetica a unei molecule este afectata de temperatura, presiune si dimensiunea moleculei;
   4. moleculele au energie īn toate starile gazoasa, lichida si solida;
   
   
2. Cronometrul este utilizat īn experimentul pentru:
   1. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   2. sa ne tina ocupati;
   3. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   4. sincronizarea timpilor de difuzie;
   
   
3. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate se deplaseaza īn aceeasi directie;
   2. toate au aceeasi viteza;
   3. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   4. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   
   
4. Pozitia inelului īn experimentul este dependenta de:
   1. latimea tubului si nu lungimea tubului;
   2. concentratiile solutiilor utilizate;
   3. lungimea tubului si nu latimea tubului;
   4. viteza la moda sau energia la moda a fiecarei specii implicate;
   5. viteza de difuzie a fiecarei specii implicate;
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   2. propagarea speciilor ca ionii si nu ca si molecule neutre;
   3. lungimea tubului si latimea tubului;
   4. viteza de difuzie a fiecarei specii implicate;
   5. lungimea tubului si nu latimea tubului;
   
   

FINAL TEST AT LABORATORY
Study of the diffusion in gaseous state and molecular speeds

1. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all have same speed;
   2. all have same energy;
   3. are considered to be at the same temperature, but may have different speeds;
   4. all are moving in the same direction;
   
   
2. We may say the followings:
   1. the molecules have energy in all gaseous, liquid and solid states;
   2. diffusion process appears only in gaseous state;
   3. the molecules have speeds only in gaseous and liquid states;
   4. the molecules have energy only in gaseous and liquid states;
   
   
3. The fog observed during the experiment is due to:
   1. our experiment designed to trap the product of the reaction;
   2. unproper illumination in the laboratory and our breathing;
   3. presence of the ammonia;
   4. formation of ammonium chloride;
   
   
4. The chronometer is used in the experiment for:
   1. indication of the moment when we should pay attention to the experiment;
   2. measuring of the diffusion time;
   3. to keep us busy;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
5. At the ends of the tube following equilibrium reactions occurs:
   1. H₂O \=\ H⁺ + HO^-
   2. H⁺ + HO^- \=\ H₂O
   3. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   4. NH₃ + HCl \=\ NH₄Cl
   
   

TEST DE FINAL DE LABORATOR
Studiul difuziei in stare gazoasa si a vitezelor moleculare

1. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate au aceeasi viteza;
   2. toate au aceeasi energie;
   3. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   4. toate se deplaseaza īn aceeasi directie;
   
   
2. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au energie īn toate starile gazoasa, lichida si solida;
   2. proces de difuzie apare numai īn stare gazoasa;
   3. moleculele au viteze numai īn stare gazoasa si lichida;
   4. moleculele au energie numai īn stare gazoasa si lichida;
   
   
3. Ceata observata īn timpul experimentului se datoreaza:
   1. experimentului nostru proiectat pentru a captura produsul de reactie;
   2. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   3. prezentei amoniacului;
   4. formarea clorurii de amoniu;
   5. prezentei clorului;
   
   
4. Cronometrul este utilizat īn experimentul pentru:
   1. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   2. masurarea timpului de difuzie;
   3. sa ne tina ocupati;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   
   
5. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H₂O \=\ H⁺ + HO^-
   2. H⁺ + HO^- \=\ H₂O
   3. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   4. NH₃ + HCl \=\ NH₄Cl
   5. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   

FINAL TEST AT LABORATORY
Study of the diffusion in gaseous state and molecular speeds

1. The time to the formation of the ring in the experiment is dependent on:
   1. the concentrations of the solutions used;
   2. the average energy or average speed of each involved species;
   3. the real speeds and not the virtual speeds of each involved species;
   4. the propagation of the species as ions and not as neutral molecules;
   
   
2. At the ends of the tube following equilibrium reactions occurs:
   1. H⁺ + HO^- \=\ H₂O
   2. H₂O \=\ H⁺ + HO^-
   3. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
3. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory or our breathing;
   2. presence of the ammonia;
   3. formation of ammonium chloride;
   4. our experiment designed to trap the product of the reaction;
   
   
4. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. are considered to be at the same temperature, but may have different energies;
   2. all have same speed;
   3. all have same energy;
   4. are considered to be at the same temperature, but may have different speeds;
   
   
5. The chronometer is used in the experiment for:
   1. measuring of the diffusion time;
   2. synchronization of the diffusion times;
   3. indication of the moment when we should pay attention to the experiment;
   4. extracting the information necessary to calculate the speeds ratio;
   
   

TEST DE FINAL DE LABORATOR
Studiul difuziei in stare gazoasa si a vitezelor moleculare

1. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. concentratiile solutiilor utilizate;
   2. energia medie sau viteza medie a fiecarei specii implicate;
   3. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   4. propagarea speciilor ca ionii si nu ca si molecule neutre;
   5. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   
   
2. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H⁺ + HO^- \=\ H₂O
   2. H₂O \=\ H⁺ + HO^-
   3. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   5. NH₃ + HCl \=\ NH₄Cl
   
   
3. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   2. prezentei amoniacului;
   3. formarea clorurii de amoniu;
   4. experimentului nostru proiectat pentru a captura produsul de reactie;
   5. prezentei clorului;
   
   
4. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   2. toate au aceeasi viteza;
   3. toate au aceeasi energie;
   4. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   5. toate se īndreapta īntr-o directie arbitrara;
   
   
5. Cronometrul este utilizat īn experimentul pentru:
   1. masurarea timpului de difuzie;
   2. sincronizarea timpilor de difuzie;
   3. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   
   

FINAL TEST AT LABORATORY
Study of the diffusion in gaseous state and molecular speeds

1. The time to the formation of the ring in the experiment is dependent on:
   1. the propagation of the species as ions and not as neutral molecules;
   2. the virtual speeds and not the real speeds of each involved species;
   3. the mode energy or mode speed of each involved species;
   4. the width of the tube and not of the length of the tube;
   
   
2. The chronometer is used in the experiment for:
   1. to keep us busy;
   2. extracting the information necessary to calculate the speeds ratio;
   3. measuring of the diffusion time;
   4. indication of the moment when we should pay attention to the experiment;
   
   
3. The fog observed during the experiment is due to:
   1. presence of the chlorine;
   2. unproper illumination in the laboratory and our breathing;
   3. formation of ammonium chloride;
   4. our experiment designed to trap the product of the reaction;
   
   
4. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. are considered to be at the same temperature, but may have different energies;
   2. all have same energy;
   3. are considered to be at the same temperature, but may have different speeds;
   4. all have same speed;
   
   
5. We may say the followings:
   1. the kinetic energy of a molecule is affected by temperature and pressure;
   2. the molecules have energy in all gaseous, liquid and solid states;
   3. diffusion process appears in all gaseous, liquid and solid states;
   4. diffusion process appears only in gaseous state;
   
   

TEST DE FINAL DE LABORATOR
Studiul difuziei in stare gazoasa si a vitezelor moleculare

1. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. propagarea speciilor ca ionii si nu ca si molecule neutre;
   2. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   3. viteza la moda sau energia la moda a fiecarei specii implicate;
   4. latimea tubului si nu lungimea tubului;
   5. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   
   
2. Cronometrul este utilizat īn experimentul pentru:
   1. sa ne tina ocupati;
   2. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   3. masurarea timpului de difuzie;
   4. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   
   
3. Ceata observata īn timpul experimentului se datoreaza:
   1. prezentei clorului;
   2. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   3. formarea clorurii de amoniu;
   4. experimentului nostru proiectat pentru a captura produsul de reactie;
   
   
4. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   2. toate au aceeasi energie;
   3. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   4. toate au aceeasi viteza;
   
   
5. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. energia cinetica a unei molecule este afectata de temperatura si presiune;
   2. moleculele au energie īn toate starile gazoasa, lichida si solida;
   3. proces de difuzie apare īn toate starile gazoasa, lichida si solida;
   4. proces de difuzie apare numai īn stare gazoasa;
   5. moleculele au energie numai īn stare gazoasa;
   
   

FINAL TEST AT LABORATORY
Study of the diffusion in gaseous state and molecular speeds

1. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. are considered to be at the same temperature, but may have different energies;
   2. are considered to be at the same temperature, but may have different speeds;
   3. all have same speed;
   4. all are moving in the same direction;
   
   
2. The chronometer is used in the experiment for:
   1. measuring of the diffusion time;
   2. synchronization of the diffusion times;
   3. extracting the information necessary to calculate the diffusion coefficients;
   4. indication of the moment when we should pay attention to the experiment;
   
   
3. The time to the formation of the ring in the experiment is dependent on:
   1. the length of the tube and the width of the tube;
   2. the mode energy or mode speed of each involved species;
   3. the average energy or average speed of each involved species;
   4. the propagation of the species as neutral molecules and not as ions;
   
   
4. We may say the followings:
   1. the molecules have energy in all gaseous, liquid and solid states;
   2. the kinetic energy of a molecule is affected by temperature only;
   3. the kinetic energy of a molecule is affected by temperature and pressure;
   4. the molecules have energy only in gaseous state;
   
   
5. At the ends of the tube following equilibrium reactions occurs:
   1. H₂O \=\ H⁺ + HO^-
   2. H⁺ + HO^- \=\ H₂O
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. NH₃ + HCl \=\ NH₄Cl
   
   

TEST DE FINAL DE LABORATOR
Studiul difuziei in stare gazoasa si a vitezelor moleculare

1. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   2. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   3. toate au aceeasi viteza;
   4. toate se deplaseaza īn aceeasi directie;
   5. toate au aceeasi energie;
   
   
2. Cronometrul este utilizat īn experimentul pentru:
   1. masurarea timpului de difuzie;
   2. sincronizarea timpilor de difuzie;
   3. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   4. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   
   
3. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. lungimea tubului si latimea tubului;
   2. viteza la moda sau energia la moda a fiecarei specii implicate;
   3. energia medie sau viteza medie a fiecarei specii implicate;
   4. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   5. concentratiile solutiilor utilizate;
   
   
4. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au energie īn toate starile gazoasa, lichida si solida;
   2. energia cinetica a unei molecule este afectata de numai temperatura;
   3. energia cinetica a unei molecule este afectata de temperatura si presiune;
   4. moleculele au energie numai īn stare gazoasa;
   
   
5. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H₂O \=\ H⁺ + HO^-
   2. H⁺ + HO^- \=\ H₂O
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. NH₃ + HCl \=\ NH₄Cl
   
   

FINAL TEST AT LABORATORY
Obtaining of the oxygen: study of the gases laws

1. For gaseous state:
   1. the pressure depends on the model which are used to approximate it;
   2. the pressure is much lower than in liquid state;
   3. the pressure is approximately the same as in liquid state;
   4. the pressure is exactly the same as in liquid state;
   
   
2. A state equation for a real gas is:
   1. a relation between an unlimited number of state parameters;
   2. a relation which takes into account certain deviations from the ideal model;
   3. a relation obtained after conducting of the experiment;
   4. a relation between an certain number of state parameters;
   
   
3. The values taken from the experiment conducted in the laboratory indicated that:
   1. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   2. air were released as result of the decomposition;
   3. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   4. we possess enough information to decide what gas was released from the reaction;
   
   
4. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   2. Ag + O₂ -> Ag₂O;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   
   
5. In the laboratory were studied:
   1. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   2. the lost of the mass of a solid as result of producing of some gas;
   3. increasing of the temperature of a solid mass when was heated;
   4. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pentru stare gazoasa:
   1. presiunea depinde de modelul care este utilizat pentru o aproxima;
   2. presiunea este mult mai mica decāt īn stare lichida;
   3. presiunea este aproximativ aceeasi ca si īn stare lichida;
   4. presiunea este exact la fel ca si īn stare lichida;
   
   
2. O ecuatie de stare pentru un gaz real este:
   1. o relatie īntre un numar nelimitat de parametri de stare;
   2. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   3. o relatie obtinut dupa efectuarea experimentului;
   4. o relatie īntre un anumit numar de parametri de stare;
   
   
3. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   2. aer a fost eliberat ca urmare a descompunerii;
   3. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   4. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   5. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   2. Ag + O₂ -> Ag₂O;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   
   
5. Īn laborator s-au studiat:
   1. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   2. pierdut din masa de solid ca urmare a producerii unor gaze;
   3. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   5. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   
   

FINAL TEST AT LABORATORY
Obtaining of the oxygen: study of the gases laws

1. For gaseous state:
   1. the pressure is much higher than in liquid state;
   2. it exists an equation for all, p · V = n · R · T;
   3. the pressure is approximately the same as in liquid state;
   4. the pressure is much lower than in liquid state;
   
   
2. The values taken from the experiment conducted in the laboratory indicated that:
   1. we possess enough information to decide what gas was released from the reaction;
   2. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   3. ozone were released as result of the decomposition;
   4. the ideal model of a gas approximated the best the behavior of the released gas;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KNO₂ + O₂ -> KNO₃;
   2. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   3. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   4. KCl + O₂ -> KClO₃;
   
   
4. A state equation for a real gas is:
   1. a relation which may involve some constants dependent of gas composition;
   2. a relation obtained after conducting of the experiment;
   3. a relation derived to approximate the relation between state parameters;
   4. a relation between an unlimited number of state parameters;
   
   
5. In the laboratory were studied:
   1. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   2. increasing of the pressure of a gas when was heated;
   3. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   4. increasing of the temperature of a solid mass when was heated;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pentru stare gazoasa:
   1. presiunea este mult mai mare decāt īn stare lichida;
   2. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   3. presiunea este aproximativ aceeasi ca si īn stare lichida;
   4. presiunea este mult mai mica decāt īn stare lichida;
   5. presiunea este exact la fel ca si īn stare lichida;
   
   
2. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   2. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. ozonul au fost eliberat ca urmare a descompunerii;
   4. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   5. oxigenul au fost eliberat ca urmare a descompunerii;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KNO₂ + O₂ -> KNO₃;
   2. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   3. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   4. KCl + O₂ -> KClO₃;
   
   
4. O ecuatie de stare pentru un gaz real este:
   1. o relatie care poate implica unele constante dependente de compozitia gazului;
   2. o relatie obtinut dupa efectuarea experimentului;
   3. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   4. o relatie īntre un numar nelimitat de parametri de stare;
   
   
5. Īn laborator s-au studiat:
   1. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   2. cresterea presiunii unui gaz cānd s-a īncalzit;
   3. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   4. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   5. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   
   

FINAL TEST AT LABORATORY
Obtaining of the oxygen: study of the gases laws

1. A state equation for a real gas is:
   1. a relation obtained after conducting of the experiment;
   2. a relation between an unlimited number of state parameters;
   3. a relation which is always true, independent of the values of the state parameters;
   4. a relation which may involve some constants dependent of gas composition;
   
   
2. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   3. increasing of the temperature of a solid mass when was heated;
   4. increasing of the pressure of a gas when was heated;
   
   
3. For gaseous state:
   1. the pressure is exactly the same as in liquid state;
   2. the pressure is much lower than in liquid state;
   3. the pressure is much higher than in liquid state;
   4. it exists an equation for all, p · V = n · R · T;
   
   
4. The values taken from the experiment conducted in the laboratory indicated that:
   1. oxigen were released as result of the decomposition;
   2. we do not possess enough information to decide what gas was released from the reaction;
   3. the ideal model of a gas approximated the worst the behavior of the released gas;
   4. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   
   
5. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KClO₃ -> KCl + O₂;
   2. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   3. opening a bubble water bottle;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. O ecuatie de stare pentru un gaz real este:
   1. o relatie obtinut dupa efectuarea experimentului;
   2. o relatie īntre un numar nelimitat de parametri de stare;
   3. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   4. o relatie care poate implica unele constante dependente de compozitia gazului;
   
   
2. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   3. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   4. cresterea presiunii unui gaz cānd s-a īncalzit;
   
   
3. Pentru stare gazoasa:
   1. presiunea este exact la fel ca si īn stare lichida;
   2. presiunea este mult mai mica decāt īn stare lichida;
   3. presiunea este mult mai mare decāt īn stare lichida;
   4. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   
   
4. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. oxigenul au fost eliberat ca urmare a descompunerii;
   2. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   3. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   4. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   5. aer a fost eliberat ca urmare a descompunerii;
   
   
5. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KClO₃ -> KCl + O₂;
   2. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   3. deschiderea unei sticle de apa cu bule;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   5. KNO₃ -> KNO₂ + O₂;
   
   

FINAL TEST AT LABORATORY
Obtaining of the oxygen: study of the gases laws

1. A state equation for a real gas is:
   1. a relation obtained after conducting of the experiment;
   2. a relation which is always true, independent of the values of the state parameters;
   3. a relation between an certain number of state parameters;
   4. a relation which takes into account certain deviations from the ideal model;
   
   
2. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. distillation of the liquid air;
   2. KCl + O₂ -> KClO₃;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. KClO₃ -> KCl + O₂;
   
   
3. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   2. the producing of some gas as result of a lost of the mass of a solid;
   3. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   4. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   
   
4. For gaseous state:
   1. the pressure depends on the model which are used to approximate it;
   2. we need to take supplementary precautions in the laboratory;
   3. the pressure is approximately the same as in liquid state;
   4. the pressure is exactly the same as in liquid state;
   
   
5. The values taken from the experiment conducted in the laboratory indicated that:
   1. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   2. oxigen were released as result of the decomposition;
   3. air were released as result of the decomposition;
   4. we do not possess enough information to decide what gas was released from the reaction;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. O ecuatie de stare pentru un gaz real este:
   1. o relatie obtinut dupa efectuarea experimentului;
   2. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   3. o relatie īntre un anumit numar de parametri de stare;
   4. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   5. o relatie care poate implica unele constante dependente de compozitia gazului;
   
   
2. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. distilarea aerului lichid;
   2. KCl + O₂ -> KClO₃;
   3. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   4. KClO₃ -> KCl + O₂;
   
   
3. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   2. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   3. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   5. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   
   
4. Pentru stare gazoasa:
   1. presiunea depinde de modelul care este utilizat pentru o aproxima;
   2. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   3. presiunea este aproximativ aceeasi ca si īn stare lichida;
   4. presiunea este exact la fel ca si īn stare lichida;
   5. presiunea este mult mai mare decāt īn stare lichida;
   
   
5. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   2. oxigenul au fost eliberat ca urmare a descompunerii;
   3. aer a fost eliberat ca urmare a descompunerii;
   4. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   

FINAL TEST AT LABORATORY
Obtaining of the oxygen: study of the gases laws

1. The values taken from the experiment conducted in the laboratory indicated that:
   1. the ideal model of a gas approximated the worst the behavior of the released gas;
   2. we do not possess enough information to decide what gas was released from the reaction;
   3. the ideal model of a gas approximated the best the behavior of the released gas;
   4. oxigen were released as result of the decomposition;
   
   
2. For gaseous state:
   1. the pressure is much higher than in liquid state;
   2. we need to take supplementary precautions in the laboratory;
   3. it exists an equation for all, p · V = n · R · T;
   4. the pressure depends on the model which are used to approximate it;
   
   
3. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   3. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   4. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   
   
4. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. Ag + O₂ -> Ag₂O;
   2. distillation of the liquid air;
   3. H₂O₂ -> H₂O + O₂;
   4. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   
   
5. A state equation for a real gas is:
   1. a relation which may involve some constants dependent of gas composition;
   2. a relation between an certain number of state parameters;
   3. a relation which takes into account certain deviations from the ideal model;
   4. a relation between an unlimited number of state parameters;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   2. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   3. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   4. oxigenul au fost eliberat ca urmare a descompunerii;
   
   
2. Pentru stare gazoasa:
   1. presiunea este mult mai mare decāt īn stare lichida;
   2. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   3. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   4. presiunea depinde de modelul care este utilizat pentru o aproxima;
   
   
3. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   5. cresterea presiunii unui gaz cānd s-a īncalzit;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. Ag + O₂ -> Ag₂O;
   2. distilarea aerului lichid;
   3. H₂O₂ -> H₂O + O₂;
   4. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   5. KCl + O₂ -> KClO₃;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie care poate implica unele constante dependente de compozitia gazului;
   2. o relatie īntre un anumit numar de parametri de stare;
   3. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   4. o relatie īntre un numar nelimitat de parametri de stare;
   5. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as cations;
   2. electric current passes the sample and the paper;
   3. water dissociation is inhibited;
   4. electric current avoids the sample and the paper;
   
   
2. When lead is identified:
   1. a red-brown complex appears;
   2. a yellow complex appears;
   3. precautions should be made for toxic wastes disposal;
   4. interference of other ions may affect the outcome;
   
   
3. The paper requires before analysis of the sample:
   1. to be tested;
   2. to be moistened with an electrolyte;
   3. to be dry;
   4. to be weighted;
   
   
4. This method of analysis of metals and alloys is:
   1. a destructive method of analysis;
   2. not useful for both metals and alloys;
   3. a nondestructive method of analysis;
   4. useful for alloys, not so useful for metals;
   
   
5. Why moisten the paper with solution of sodium nitrate?
   1. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   2. to have something to do in the laboratory;
   3. for stopping after a while the chemical reaction that takes place;
   4. to accomodate ourselves to use chemicals;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd circuitul electric este īnchis:
   1. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   2. curent electric trece prin proba si hārtie;
   3. disocierea apei este inhibata;
   4. curent electric evita proba si hārtia;
   5. elemente din solutie sunt trecute īn proba ca metale;
   
   
2. Cānd plumbul este identificat:
   1. apare un complex rosu-brun;
   2. apare un complex galben;
   3. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   4. interferenta altor ioni poate afecta rezultatul;
   5. reactiile utilizate īn mod clar ii indica prezenta;
   
   
3. Hartia necesita ca īnainte de analiza probei:
   1. sa fie testata;
   2. sa fie umezita cu un electrolit;
   3. sa fie uscata;
   4. sa fie cantarita;
   
   
4. Aceasta metoda de analiza de metale si aliaje este:
   1. o metoda distructiva de analiza;
   2. nu este utila nici pentru metale nici pentru aliaje;
   3. o metoda nedistructiva de analiza;
   4. utila pentru aliaje, nu atāt de utila pentru metale;
   5. utila atāt pentru metale si aliaje;
   
   
5. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   2. pentru a avea ceva de a face īn laborator;
   3. pentru oprirea dupa un timp reactiei chimice care are loc;
   4. sa ne acomodam in a utiliza substante chimice;
   5. pentru ca hartia sa actioneze ca izolator;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. Why moisten the paper with solution of sodium nitrate?
   1. for stopping after a while the chemical reaction that takes place;
   2. to have something to do in the laboratory;
   3. to be cut easily with scissors;
   4. to accomodate ourselves to use chemicals;
   
   
2. When lead is identified:
   1. a yellow complex appears;
   2. precautions should be made for toxic wastes disposal;
   3. interference of other ions may affect the outcome;
   4. a violet complex appears;
   
   
3. The paper requires before analysis of the sample:
   1. to be tested;
   2. to be weighted;
   3. to be burned;
   4. to be cut in small pieces;
   
   
4. When the electrical circuit is closed:
   1. cations from the solution are passed into sample as metals;
   2. electric current passes the sample and the paper;
   3. elements from the solution are passed into sample as metals;
   4. elements from the metals are passed into solution as anions;
   
   
5. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   3. dependent on the intensity of the current applied to the electrograf and composition of the metal alloy;
   4. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru oprirea dupa un timp reactiei chimice care are loc;
   2. pentru a avea ceva de a face īn laborator;
   3. sa fie taiat cu usurinta cu foarfeca;
   4. sa ne acomodam in a utiliza substante chimice;
   5. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   
   
2. Cānd plumbul este identificat:
   1. apare un complex galben;
   2. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   3. interferenta altor ioni poate afecta rezultatul;
   4. apare un complex violet;
   5. apare un complex albastru;
   
   
3. Hartia necesita ca īnainte de analiza probei:
   1. sa fie testata;
   2. sa fie cantarita;
   3. sa fie arsa;
   4. sa fie taiata īn bucati mici;
   5. sa i se masoare suprafata;
   
   
4. Cānd circuitul electric este īnchis:
   1. cationii din solutie sunt trecuti īn proba ca metale;
   2. curent electric trece prin proba si hārtie;
   3. elemente din solutie sunt trecute īn proba ca metale;
   4. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   
   
5. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   3. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   4. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The electric charges after passing the metals into solution may be:
   1. dependent on the intensity of the current applied to the electrograf and composition of the metal alloy;
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   
   
2. The paper requires before analysis of the sample:
   1. to be dry;
   2. to be cut in small pieces;
   3. to be tested;
   4. to be acidified;
   
   
3. When aluminum is identified:
   1. using of alizarin along with ammonium hidroxide provide a red colored complex;
   2. the presence of other ions may produce a true positive outcome;
   3. is identified as Al²⁺ cation;
   4. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   
   
4. Why moisten the paper with solution of sodium nitrate?
   1. for stopping after a while the chemical reaction that takes place;
   2. to have something to do in the laboratory;
   3. for the paper to work as isolator;
   4. to provide cations for analysis;
   
   
5. When the electrical circuit is closed:
   1. anions from the solution are passed into sample as metals;
   2. surface of the sample is fastly covered by a protecting shield of electrons;
   3. water dissociation is inhibited;
   4. electric current avoids the sample and the paper;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   5. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
2. Hartia necesita ca īnainte de analiza probei:
   1. sa fie uscata;
   2. sa fie taiata īn bucati mici;
   3. sa fie testata;
   4. sa fie acidulata;
   5. sa fie umezita cu un electrolit;
   
   
3. Cānd aluminiu este identificat:
   1. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   2. prezenta altor ioni poate produce un rezultat adevarat pozitiv;
   3. este identificat ca cationul Al²⁺;
   4. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   5. prezenta altor ioni poate produce un rezultat fals negativ;
   
   
4. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru oprirea dupa un timp reactiei chimice care are loc;
   2. pentru a avea ceva de a face īn laborator;
   3. pentru ca hartia sa actioneze ca izolator;
   4. pentru furniza cationi pentru analiza;
   5. sa fie taiat cu usurinta cu foarfeca;
   
   
5. Cānd circuitul electric este īnchis:
   1. anionii din solutie sunt trecuti īn proba ca metale;
   2. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   3. disocierea apei este inhibata;
   4. curent electric evita proba si hārtia;
   5. curent electric trece prin proba si hārtie;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The paper requires before analysis of the sample:
   1. to measure its surface;
   2. to be weighted;
   3. to be burned;
   4. to be moistened with an electrolyte;
   
   
2. When aluminum is identified:
   1. the presence of other ions may produce a true negative outcome;
   2. using of alizarin along with ammonium hidroxide provide a red colored complex;
   3. is identified as Al³⁺ cation;
   4. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   
   
3. This method of analysis of metals and alloys is:
   1. useful for alloys, not so useful for metals;
   2. too ancient to be used today in the laboratory;
   3. a gravimetric method of analysis;
   4. not useful for both metals and alloys;
   
   
4. When lead is identified:
   1. precautions should be made for toxic wastes disposal;
   2. interference of other ions may affect the outcome;
   3. a blue complex appears;
   4. a violet complex appears;
   
   
5. Why moisten the paper with solution of sodium nitrate?
   1. to provide cations for analysis;
   2. to accomodate ourselves to use chemicals;
   3. for stopping after a while the chemical reaction that takes place;
   4. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Hartia necesita ca īnainte de analiza probei:
   1. sa i se masoare suprafata;
   2. sa fie cantarita;
   3. sa fie arsa;
   4. sa fie umezita cu un electrolit;
   
   
2. Cānd aluminiu este identificat:
   1. prezenta altor ioni poate produce un rezultat adevarat negativ;
   2. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   3. este identificat ca cationul Al³⁺;
   4. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   
   
3. Aceasta metoda de analiza de metale si aliaje este:
   1. utila pentru aliaje, nu atāt de utila pentru metale;
   2. prea veche pentru a fi utilizata īn prezent īn laborator;
   3. o metoda gravimetrica de analiza;
   4. nu este utila nici pentru metale nici pentru aliaje;
   
   
4. Cānd plumbul este identificat:
   1. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   2. interferenta altor ioni poate afecta rezultatul;
   3. apare un complex albastru;
   4. apare un complex violet;
   5. reactiile utilizate īn mod clar ii indica prezenta;
   
   
5. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru furniza cationi pentru analiza;
   2. sa ne acomodam in a utiliza substante chimice;
   3. pentru oprirea dupa un timp reactiei chimice care are loc;
   4. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. This method of analysis of metals and alloys is:
   1. useful for pure metals, not so useful for alloys;
   2. useful for both metals and alloys;
   3. a destructive method of analysis;
   4. a quantitative method of analysis;
   
   
2. When aluminum is identified:
   1. the presence of other ions may produce a false positive outcome;
   2. is identified as Al²⁺ cation;
   3. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   4. supplementary precautions should be taken, because the plates are made from aluminum too;
   
   
3. The paper requires before analysis of the sample:
   1. to be tested;
   2. to be dry;
   3. to be cut in small pieces;
   4. to measure its surface;
   
   
4. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
5. When lead is identified:
   1. interference of other ions may affect the outcome;
   2. a red-brown complex appears;
   3. a violet complex appears;
   4. dangerous substances are used;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Aceasta metoda de analiza de metale si aliaje este:
   1. utila pentru metale pure, nu atāt de utila pentru aliaje;
   2. utila atāt pentru metale si aliaje;
   3. o metoda distructiva de analiza;
   4. o metoda cantitativa de analiza;
   
   
2. Cānd aluminiu este identificat:
   1. prezenta altor ioni poate produce un rezultat fals pozitiv;
   2. este identificat ca cationul Al²⁺;
   3. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   4. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   5. prezenta altor ioni poate produce un rezultat adevarat pozitiv;
   
   
3. Hartia necesita ca īnainte de analiza probei:
   1. sa fie testata;
   2. sa fie uscata;
   3. sa fie taiata īn bucati mici;
   4. sa i se masoare suprafata;
   5. sa fie arsa;
   
   
4. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
5. Cānd plumbul este identificat:
   1. interferenta altor ioni poate afecta rezultatul;
   2. apare un complex rosu-brun;
   3. apare un complex violet;
   4. sunt utilizate substante periculoase;
   5. apare un complex albastru;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. In the calculations:
   1. are necessary to use some formulas expressing in different ways the concentration;
   2. are necessary to discuss with our colleagues;
   3. are necessary to take some information from reagent bottles;
   4. are necessary to take the results imediatly after these are available from others;
   
   
2. A redox process:
   1. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. involves changing of the oxidation states of some participants to the reaction;
   3. involves changing of the aggregation states of some participants to the reaction;
   4. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
3. The density of the solutions depends on:
   1. quantity;
   2. pressure;
   3. provider;
   4. temperature;
   
   
4. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the volume;
   2. all glassware should be clean before, after and during the experiment;
   3. the principle of the conservation of the number of atoms for each element;
   4. the principle of the conservation of the energy;
   
   
5. The indicator should be added:
   1. to indicate our safety limits when we dealt with chemicals;
   2. only at the suggestion of the supervisor;
   3. in small quantities, to avoid the errors in observations and in calculations;
   4. in large quantities, according to the principle 'only size matters';
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. In calcule:
   1. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   2. este necesar sa discutam cu colegii;
   3. este necesar a se lua unele informatii de pe sticlele de reactivi;
   4. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   
   
2. Un proces redox:
   1. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   3. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   4. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   5. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   
   
3. Densitatea solutiilor depinde de:
   1. cantitate;
   2. presiune;
   3. furnizor;
   4. temperatura;
   
   
4. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii volumului;
   2. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   3. principiul conservarii numarul de atomi pentru fiecare element;
   4. principiul conservarii energiei;
   5. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   
   
5. Trebuie adaugat indicatorul:
   1. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   2. numai la sugestia supraveghetorului;
   3. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   4. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   5. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. Reactions between acids and bases:
   1. always have as a consequence the formation of a quantity of water;
   2. are all exothermic, being therefore dangerous outside of the laboratory;
   3. have as effect the change of the color of a solution;
   4. have as a consequence the dissolution of a salt;
   
   
2. The following chemical reactions were used in the experiments:
   1. H₂O + CO₂ -> H₂CO₃
   2. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
3. In the calculations:
   1. are necessary to establish the coefficients of the chemical reaction;
   2. are necessary to use our phones;
   3. are necessary to discuss with our colleagues;
   4. are necessary to use some formulas expressing in different ways the concentration;
   
   
4. The density of the solutions depends on:
   1. pressure;
   2. provider;
   3. concentration;
   4. time elapsed since were prepared;
   
   
5. Titration as a laboratory operation involves:
   1. a mass measurement;
   2. a sulphuric acid solution;
   3. a pH indicator that changes color depending on the pH of the solution;
   4. a burette;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Reactiile īntre acizi si baze:
   1. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   2. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   3. au ca efect schimbarea culorii unei solutii;
   4. au drept consecinta dizolvarea unei sari;
   5. sunt rareori utile, si chiar mai rar utilizate;
   
   
2. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. H₂O + CO₂ -> H₂CO₃
   2. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   5. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
3. In calcule:
   1. este necesara stabilirea coeficientilor reactiei chimice;
   2. este necesar sa utilizam telefoanele;
   3. este necesar sa discutam cu colegii;
   4. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   
   
4. Densitatea solutiilor depinde de:
   1. presiune;
   2. furnizor;
   3. concentratie;
   4. timpul scurs de cand au fost pregatite;
   5. temperatura;
   
   
5. Titrarea ca o operatiune de laborator implica:
   1. masurarea masei;
   2. o solutie de acid sulfuric;
   3. un indicator de pH care īsi schimba culoarea īn functie de pH-ul solutiei;
   4. o biureta;
   5. amestecul a doua sau mai multe solutii;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. In the calculations:
   1. are necessary to discuss with our colleagues;
   2. are necessary to use some formulas expressing in different ways the concentration;
   3. are necessary to take the results imediatly after these are available from others;
   4. are necessary to take some information from reagent bottles;
   
   
2. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the number of atoms for each element;
   2. the principle of the conservation of the energy;
   3. all glassware should be clean before, after and during the experiment;
   4. the liquid in the burette should be at the same level before and after conducting the experiment;
   
   
3. The density of the solutions depends on:
   1. concentration;
   2. quantity;
   3. temperature;
   4. pressure;
   
   
4. The following chemical reactions were used in the experiments:
   1. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. H₂O + CO₂ -> H₂CO₃
   3. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
5. The equivalence point is:
   1. the point in which a reactive should be added in the reaction flask;
   2. something rarely encountered in chemistry;
   3. used to balance the equation;
   4. indicated when a color change is observed into the solution;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. In calcule:
   1. este necesar sa discutam cu colegii;
   2. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   3. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   4. este necesar a se lua unele informatii de pe sticlele de reactivi;
   5. este necesar sa utilizam telefoanele;
   
   
2. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii numarul de atomi pentru fiecare element;
   2. principiul conservarii energiei;
   3. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   4. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   
   
3. Densitatea solutiilor depinde de:
   1. concentratie;
   2. cantitate;
   3. temperatura;
   4. presiune;
   5. timpul scurs de cand au fost pregatite;
   
   
4. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. H₂O + CO₂ -> H₂CO₃
   3. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   5. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   
   
5. Punctul de echivalenta este:
   1. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   2. ceva rar īntālnit īn chimie;
   3. folosit pentru a echilibra ecuatia;
   4. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. A redox process:
   1. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. involves changing of the aggregation states of some participants to the reaction;
   3. is always fast and safe;
   4. occurs only when we mix wrong substances in the laboratory;
   
   
2. Titration as a laboratory operation involves:
   1. a salt solution;
   2. a pH indicator that changes color depending on the pH of the solution;
   3. a standard or referential reactive;
   4. a sulphuric acid solution;
   
   
3. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the number of atoms for each element;
   2. all glassware should be clean before and after conducting the experiment;
   3. the liquid in the burette should be at the same level before and after conducting the experiment;
   4. the principle of the conservation of the energy;
   
   
4. The equivalence point is:
   1. the point in which a reactive should be added in the reaction flask;
   2. the point in which a reactive should be added in the burette;
   3. the point in which a reactive is fully consumed in the reaction;
   4. indicated when a color change is observed into the solution;
   
   
5. In the calculations:
   1. are necessary to draw the tables in our notebooks after completing of the experiment;
   2. are necessary to use some formulas expressing in different ways the concentration;
   3. are necessary to establish the coefficients of the chemical reaction;
   4. are necessary to take some information from reagent bottles;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Un proces redox:
   1. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   3. este īntotdeauna rapid si sigur;
   4. apare numai atunci cānd se amesteca substante gresit īn laborator;
   5. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
2. Titrarea ca o operatiune de laborator implica:
   1. o solutie de sare;
   2. un indicator de pH care īsi schimba culoarea īn functie de pH-ul solutiei;
   3. un standard sau reactiv de referinta;
   4. o solutie de acid sulfuric;
   5. masurarea volumului;
   
   
3. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii numarul de atomi pentru fiecare element;
   2. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   3. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   4. principiul conservarii energiei;
   5. principiul conservarii volumului;
   
   
4. Punctul de echivalenta este:
   1. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   2. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   3. punctul īn care un reactiv este consumat complet īn reactie;
   4. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   
   
5. In calcule:
   1. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   2. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   3. este necesara stabilirea coeficientilor reactiei chimice;
   4. este necesar a se lua unele informatii de pe sticlele de reactivi;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. In the calculations:
   1. are necessary to draw the tables in our notebooks after completing of the experiment;
   2. are necessary to use some formulas expressing in different ways the concentration;
   3. are necessary to use our phones;
   4. are necessary to take some information from reagent bottles;
   
   
2. The density of the solutions depends on:
   1. temperature;
   2. concentration;
   3. pressure;
   4. quantity;
   
   
3. The following chemical reactions were used in the experiments:
   1. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. H₂O + CO₂ -> H₂CO₃
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   
   
4. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the energy;
   2. all glassware should be clean before, after and during the experiment;
   3. the principle of the conservation of the volume;
   4. the liquid in the burette should be at the same level before and after conducting the experiment;
   
   
5. Reactions between acids and bases:
   1. have as a consequence the dissolution of a salt;
   2. are all exothermic, being therefore dangerous outside of the laboratory;
   3. have as effect the change of the color of a solution;
   4. are always fast, taking place almost instantaneously;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. In calcule:
   1. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   2. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   3. este necesar sa utilizam telefoanele;
   4. este necesar a se lua unele informatii de pe sticlele de reactivi;
   5. este necesara stabilirea coeficientilor reactiei chimice;
   
   
2. Densitatea solutiilor depinde de:
   1. temperatura;
   2. concentratie;
   3. presiune;
   4. cantitate;
   5. timpul scurs de cand au fost pregatite;
   
   
3. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. H₂O + CO₂ -> H₂CO₃
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   
   
4. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii energiei;
   2. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   3. principiul conservarii volumului;
   4. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   5. principiul conservarii numarul de atomi pentru fiecare element;
   
   
5. Reactiile īntre acizi si baze:
   1. au drept consecinta dizolvarea unei sari;
   2. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   3. au ca efect schimbarea culorii unei solutii;
   4. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   5. sunt rareori utile, si chiar mai rar utilizate;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. In the laboratory the water were:
   1. complexed by using EDTA titrimetric method;
   2. biologically purified using the resin column;
   3. alkalinized for drinking purposes;
   4. hardened using the resin column;
   
   
2. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   2. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   
   
3. We may say the followings:
   1. natural water may contain organic matter and living organisms;
   2. purification of the water may include biological processes;
   3. water is pure only when is taken from a good freshwater mountain stream;
   4. when water contains dissolved minerals and gases is bad for drinking;
   
   
4. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + Cl^- -> NaCl + HO^-
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   
5. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   3. HCl + HO⁺ -> H₂O + Cl⁺
   4. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. In laborator apa au fost:
   1. complexata prin metoda titrimetrica EDTA;
   2. purificata biologic utilizānd coloana de rasina;
   3. alcalinizeaza pentru baut;
   4. calita folosind coloana de rasina;
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   2. NaOH + CO₃^2- -> HCO₃^- + HO^-
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   
   
3. Putem spune urmatoarele:
   1. apa naturala poate contine materie organica si organisme vii;
   2. purificarea apei poate include procese biologice;
   3. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   4. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + Cl^- -> NaCl + HO^-
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   5. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   3. HCl + HO⁺ -> H₂O + Cl⁺
   4. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. mineral acidity;
   2. color;
   3. hardness;
   4. purity;
   
   
2. In the laboratory the water were:
   1. biologically purified using the resin column;
   2. hardened using the resin column;
   3. softened using the resin column;
   4. alkalinized for drinking purposes;
   
   
3. We may say the followings:
   1. water is a good polar solvent;
   2. purification of the water may include chemical processes;
   3. purification of the water may include biological processes;
   4. when water contains dissolved minerals and gases is bad for drinking;
   
   
4. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   3. HCl + CO₃^2- -> HCO₃^- + Cl^-
   4. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   
   
5. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   2. NaOH + Cl^- -> NaCl + HO^-
   3. NaOH + NO₃^- -> NaNO₃ + HO^-
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. aciditate minerala;
   2. culoare;
   3. duritate;
   4. puritate;
   
   
2. In laborator apa au fost:
   1. purificata biologic utilizānd coloana de rasina;
   2. calita folosind coloana de rasina;
   3. dedurizata folosind coloana de rasina;
   4. alcalinizeaza pentru baut;
   5. acidulata pentru baut;
   
   
3. Putem spune urmatoarele:
   1. apa este un solvent polar bun;
   2. purificarea apei poate include procese chimice;
   3. purificarea apei poate include procese biologice;
   4. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   3. HCl + CO₃^2- -> HCO₃^- + Cl^-
   4. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   5. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   2. NaOH + Cl^- -> NaCl + HO^-
   3. NaOH + NO₃^- -> NaNO₃ + HO^-
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   5. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   
   

FINAL TEST AT LABORATORY
Water analysis

1. EDTA is used:
   1. as reagent for determining the hardness of the water;
   2. for complexing of Na¹⁺ and K¹⁺ ions;
   3. for safety precautions purposes;
   4. for indication of the equilibrium point in the reaction;
   
   
2. For a water sample following measures may be quantitatively expressed:
   1. mineral acidity;
   2. color;
   3. hardness;
   4. total alkalinity;
   
   
3. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CH₃COO^- -> CH₃COONa + HO^-
   2. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   3. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   4. NaOH + HCOO⁺ -> HCOONa + HO⁺
   
   
4. In the laboratory the water were:
   1. acidified for drinking purposes;
   2. alkalinized for drinking purposes;
   3. complexed by using EDTA titrimetric method;
   4. softened using the resin column;
   
   
5. In the laboratory were analyzed:
   1. the boiling point of the water;
   2. the temperature of the water;
   3. the hardness of the water;
   4. the solubility of the water;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. EDTA este utilizat:
   1. ca reactiv pentru determinarea duritatii apei;
   2. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   3. ca masura de siguranta;
   4. pentru indicarea punctului de echilibru īn reactie;
   
   
2. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. aciditate minerala;
   2. culoare;
   3. duritate;
   4. alcalinitate totala;
   5. alcalinitate permanenta;
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CH₃COO^- -> CH₃COONa+HO^-
   2. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   3. NaOH + CO₃^2- -> HCO₃^- + HO^-
   4. NaOH + HCOO⁺ -> HCOONa + HO⁺
   
   
4. In laborator apa au fost:
   1. acidulata pentru baut;
   2. alcalinizeaza pentru baut;
   3. complexata prin metoda titrimetrica EDTA;
   4. dedurizata folosind coloana de rasina;
   5. calita folosind coloana de rasina;
   
   
5. Īn laborator au fost analizate:
   1. punctul de fierbere al apei;
   2. temperatura apei;
   3. duritatea apei;
   4. solubilitatea apei;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. In the laboratory were analyzed:
   1. the softness of the water;
   2. the color of the water;
   3. the temperature of the water;
   4. the alkalinity of the water;
   
   
2. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   2. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   3. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
3. We may say the followings:
   1. when water contains dissolved minerals and gases is bad for drinking;
   2. water is a good polar solvent;
   3. purification of the water may include physical processes;
   4. natural water may contain organic matter and living organisms;
   
   
4. For a water sample following measures may be quantitatively expressed:
   1. total alkalinity;
   2. mineral acidity;
   3. permanent alkalinity;
   4. hardness;
   
   
5. In the laboratory the water were:
   1. acidified for drinking purposes;
   2. alkalinized for drinking purposes;
   3. hardened using the resin column;
   4. biologically purified using the resin column;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Īn laborator au fost analizate:
   1. moliciunea apei;
   2. culoarea apei;
   3. temperatura apei;
   4. alcalinitatea apei;
   5. masa apei;
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   2. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   3. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
3. Putem spune urmatoarele:
   1. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   2. apa este un solvent polar bun;
   3. purificarea apei poate include procedee fizice;
   4. apa naturala poate contine materie organica si organisme vii;
   
   
4. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. alcalinitate totala;
   2. aciditate minerala;
   3. alcalinitate permanenta;
   4. duritate;
   
   
5. In laborator apa au fost:
   1. acidulata pentru baut;
   2. alcalinizeaza pentru baut;
   3. calita folosind coloana de rasina;
   4. purificata biologic utilizānd coloana de rasina;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. color;
   2. purity;
   3. permanent alkalinity;
   4. hardness;
   
   
2. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   2. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   3. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   4. NaOH + Cl^- -> NaCl + HO^-
   
   
3. EDTA is used:
   1. for recharging of the resin for water softening;
   2. for complexing of Na¹⁺ and K¹⁺ ions;
   3. for safety precautions purposes;
   4. for complexing of Ca²⁺ and Mg²⁺ ions;
   
   
4. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   2. HCl + HO^- -> H₂O + Cl^-
   3. HCl + CO₃^2- -> HCO₃^- + Cl^-
   4. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   
   
5. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + HO^- -> H₂O + Cl^-
   2. HCl + HO⁺ -> H₂O + Cl⁺
   3. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   4. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. culoare;
   2. puritate;
   3. alcalinitate permanenta;
   4. duritate;
   5. aciditate totala;
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   2. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   3. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   4. NaOH + Cl^- -> NaCl + HO^-
   
   
3. EDTA este utilizat:
   1. pentru reīncarcarea rasinii la dedurizarea apei;
   2. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   3. ca masura de siguranta;
   4. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   2. HCl + HO^- -> H₂O+Cl^-
   3. HCl + CO₃^2- -> HCO₃^- + Cl^-
   4. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   5. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + HO^- -> H₂O + Cl^-
   2. HCl + HO⁺ -> H₂O + Cl⁺
   3. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   4. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   
   

FINAL TEST AT LABORATORY
Volumetric and gravimetric methods in study of corrosion

1. Which of the following reactions may be called as of corrosion:
   1. ZnO + CO -> Zn + CO₂
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. Al₂O₃ + NaOH -> NaAlO₂
   4. Fe₂O₃ + CO -> Fe + CO₂
   
   
2. Corrosion of metals:
   1. is helping in the process of cleaning the metals surfaces;
   2. is a beneficial process that shows the stability of metals;
   3. is the protection in time to chemical agents;
   4. can be reduced by electroplating;
   
   
3. The aluminum plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was involved in the gravimetric method of corrosion analysis
   3. was degreased in sodium hydroxide solution;
   4. the mass is measured before and after immersing it in NaOH;
   
   
4. The zinc plate:
   1. the mass is measured before and after immersing it in H₂SO₄;
   2. the volume is measured before and after immersing it in H₂SO₄;
   3. the surface is measured before and after immersing it in H₂SO₄;
   4. was involved in the gravimetric method of corrosion analysis
   
   
5. In studied corrosion processes:
   1. a gas is released only the corrosion of aluminum;
   2. a gas is released at both corrosion of zinc and aluminum;
   3. the metal it changes its oxidation state becoming an cation;
   4. when a gas is released its volume depends on the amount of metal corroded;
   
   

TEST DE FINAL DE LABORATOR
Metode volumetrice si gravimetrice in studiul coroziunii

1. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. ZnO + CO -> Zn + CO₂
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. Al₂O₃ + NaOH -> NaAlO₂
   4. Fe₂O₃ + CO -> Fe + CO₂
   
   
2. Coroziunea metalelor:
   1. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   2. este un proces benefic care arata stabilitatea metalelor;
   3. este protectia de durata impotriva agentilor chimici;
   4. poate fi redusa prin galvanizare;
   5. este distrugerea metalelor sub actiunea factorilor externi;
   
   
3. Pentru placa de aluminiu:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. a fost degresata īn solutie de hidroxid de sodiu;
   4. masa este masurata īnainte si dupa imersia īn NaOH;
   
   
4. Pentru placa de zinc:
   1. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   2. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   3. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   5. a fost degresata īn solutie de acid sulfuric;
   
   
5. Īn procesele de coroziune studiate:
   1. un gaz este eliberat numai la corodarea aluminiului;
   2. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   3. metalul isi schimba starea de oxidare pentru a deveni un cation;
   4. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   
   

FINAL TEST AT LABORATORY
Volumetric and gravimetric methods in study of corrosion

1. Which of the following reactions may be called as of corrosion:
   1. Ni(CO)₄ -> Ni + CO
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. ZnO + CO -> Zn + CO₂
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   
2. The zinc plate:
   1. the mass is measured before and after immersing it in H₂SO₄;
   2. was degreased in sulfuric acid solution;
   3. the volume is measured before and after immersing it in H₂SO₄;
   4. was involved in the volumetric method of corrosion analysis
   
   
3. Corrosion of metals:
   1. is the destruction of metals under the action of external factors;
   2. is helping in the process of cleaning the metals surfaces;
   3. can be reduced by electroplating;
   4. may provide useful raw materials for analysis;
   
   
4. In studied corrosion processes:
   1. a gas is released only the corrosion of zinc;
   2. the metal it changes its oxidation state becoming an cation;
   3. a gas is released only the corrosion of aluminum;
   4. a gas is released at both corrosion of zinc and aluminum;
   
   
5. The aluminum plate:
   1. the mass is measured before and after immersing it in NaOH;
   2. was involved in the volumetric method of corrosion analysis
   3. was degreased in sodium hydroxide solution;
   4. the surface is measured before and after immersing it in NaOH;
   
   

TEST DE FINAL DE LABORATOR
Metode volumetrice si gravimetrice in studiul coroziunii

1. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. Ni(CO)₄ -> Ni + CO
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. ZnO + CO -> Zn + CO₂
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   5. H⁺ + Ni -> H₂ + Ni²⁺
   
   
2. Pentru placa de zinc:
   1. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   2. a fost degresata īn solutie de acid sulfuric;
   3. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   4. a fost implicata īn metoda volumetrica de analiza a coroziunii
   5. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
3. Coroziunea metalelor:
   1. este distrugerea metalelor sub actiunea factorilor externi;
   2. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   3. poate fi redusa prin galvanizare;
   4. poate furniza materii prime utile pentru analiza;
   
   
4. Īn procesele de coroziune studiate:
   1. un gaz este eliberat numai la corodarea zincului;
   2. metalul isi schimba starea de oxidare pentru a deveni un cation;
   3. un gaz este eliberat numai la corodarea aluminiului;
   4. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   5. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   
   
5. Pentru placa de aluminiu:
   1. masa este masurata īnainte si dupa imersia īn NaOH;
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. a fost degresata īn solutie de hidroxid de sodiu;
   4. suprafata se masoara īnainte si dupa imersia īn NaOH;
   5. a fost corodata īn solutie de hidroxid de sodiu;
   
   

FINAL TEST AT LABORATORY
Volumetric and gravimetric methods in study of corrosion

1. In studied corrosion processes:
   1. when a gas is released its volume depends on the amount of metal corroded;
   2. a gas is released at both corrosion of zinc and aluminum;
   3. always the metal changes its oxidation state;
   4. the metal it changes its oxidation state becoming an anion;
   
   
2. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. Ni(CO)₄ -> Ni + CO
   4. H⁺ + Fe -> H₂ + Fe²⁺
   
   
3. Corrosion of metals:
   1. takes place merely from exposure to moisture in air;
   2. is helping in the process of cleaning the metals surfaces;
   3. is the destruction of metals under the action of external factors;
   4. is the protection in time to chemical agents;
   
   
4. The zinc plate:
   1. the mass is measured before and after immersing it in H₂SO₄;
   2. was involved in the volumetric method of corrosion analysis
   3. the surface is measured before and after immersing it in H₂SO₄;
   4. the volume is measured before and after immersing it in H₂SO₄;
   
   
5. The aluminum plate:
   1. the surface is measured before and after immersing it in NaOH;
   2. the mass is measured before and after immersing it in NaOH;
   3. was corroded in sodium hydroxide solution;
   4. was degreased in sodium hydroxide solution;
   
   

TEST DE FINAL DE LABORATOR
Metode volumetrice si gravimetrice in studiul coroziunii

1. Īn procesele de coroziune studiate:
   1. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   2. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   3. īntotdeauna metalul isi schimba starea de oxidare;
   4. metalul isi schimba starea de oxidare pentru a deveni un anion;
   
   
2. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. Ni(CO)₄ -> Ni + CO
   4. H⁺ + Fe -> H₂ + Fe²⁺
   
   
3. Coroziunea metalelor:
   1. are loc pur si simplu prin expunerea la umiditate īn aer;
   2. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   3. este distrugerea metalelor sub actiunea factorilor externi;
   4. este protectia de durata impotriva agentilor chimici;
   5. poate furniza materii prime utile pentru analiza;
   
   
4. Pentru placa de zinc:
   1. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   4. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   
   
5. Pentru placa de aluminiu:
   1. suprafata se masoara īnainte si dupa imersia īn NaOH;
   2. masa este masurata īnainte si dupa imersia īn NaOH;
   3. a fost corodata īn solutie de hidroxid de sodiu;
   4. a fost degresata īn solutie de hidroxid de sodiu;
   5. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   

FINAL TEST AT LABORATORY
Volumetric and gravimetric methods in study of corrosion

1. In studied corrosion processes:
   1. always the metal changes its oxidation state;
   2. the metal it changes its oxidation state becoming an anion;
   3. the metal it changes its oxidation state becoming an cation;
   4. a gas is released only the corrosion of aluminum;
   
   
2. The zinc plate:
   1. was involved in the volumetric method of corrosion analysis
   2. the mass is measured before and after immersing it in H₂SO₄;
   3. the surface is measured before and after immersing it in H₂SO₄;
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   
3. The aluminum plate:
   1. was degreased in sodium hydroxide solution;
   2. the volume is measured before and after immersing it in NaOH;
   3. was involved in the volumetric method of corrosion analysis
   4. was involved in the gravimetric method of corrosion analysis
   
   
4. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. Fe₂O₃ + CO -> Fe + CO₂
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. H⁺ + Fe -> H₂ + Fe²⁺
   
   
5. Corrosion of metals:
   1. is the protection in time to chemical agents;
   2. is helping in the process of cleaning the metals surfaces;
   3. can be reduced by electroplating;
   4. takes place merely from exposure to moisture in air;
   
   

TEST DE FINAL DE LABORATOR
Metode volumetrice si gravimetrice in studiul coroziunii

1. Īn procesele de coroziune studiate:
   1. īntotdeauna metalul isi schimba starea de oxidare;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. metalul isi schimba starea de oxidare pentru a deveni un cation;
   4. un gaz este eliberat numai la corodarea aluminiului;
   5. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   
   
2. Pentru placa de zinc:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   3. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
3. Pentru placa de aluminiu:
   1. a fost degresata īn solutie de hidroxid de sodiu;
   2. volumul se masoara īnainte si dupa imersia īn NaOH;
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
4. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. Fe₂O₃ + CO -> Fe + CO₂
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. H⁺ + Fe -> H₂ + Fe²⁺
   5. ZnO + CO -> Zn + CO₂
   
   
5. Coroziunea metalelor:
   1. este protectia de durata impotriva agentilor chimici;
   2. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   3. poate fi redusa prin galvanizare;
   4. are loc pur si simplu prin expunerea la umiditate īn aer;
   5. este distrugerea metalelor sub actiunea factorilor externi;
   
   

FINAL TEST AT LABORATORY
Volumetric and gravimetric methods in study of corrosion

1. Which of the following reactions may be called as of corrosion:
   1. ZnO + CO -> Zn + CO₂
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. Ni(CO)₄ -> Ni + CO
   4. Fe₂O₃ + CO -> Fe + CO₂
   
   
2. The aluminum plate:
   1. was involved in the gravimetric method of corrosion analysis
   2. was degreased in sodium hydroxide solution;
   3. was corroded in sodium hydroxide solution;
   4. was involved in the volumetric method of corrosion analysis
   
   
3. The zinc plate:
   1. was degreased in sulfuric acid solution;
   2. was involved in the volumetric method of corrosion analysis
   3. was corroded in sulfuric solution;
   4. the surface is measured before and after immersing it in H₂SO₄;
   
   
4. In studied corrosion processes:
   1. a gas is released at both corrosion of zinc and aluminum;
   2. a gas is released only the corrosion of zinc;
   3. when a gas is released its volume depends on the amount of metal corroded;
   4. the metal it changes its oxidation state becoming an cation;
   
   
5. Corrosion of metals:
   1. is helping in the process of cleaning the metals surfaces;
   2. can be reduced by electroplating;
   3. is the destruction of metals under the action of external factors;
   4. may provide useful raw materials for analysis;
   
   

TEST DE FINAL DE LABORATOR
Metode volumetrice si gravimetrice in studiul coroziunii

1. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. ZnO + CO -> Zn + CO₂
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. Ni(CO)₄ -> Ni + CO
   4. Fe₂O₃ + CO -> Fe + CO₂
   5. H⁺ + Ni -> H₂ + Ni²⁺
   
   
2. Pentru placa de aluminiu:
   1. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   2. a fost degresata īn solutie de hidroxid de sodiu;
   3. a fost corodata īn solutie de hidroxid de sodiu;
   4. a fost implicata īn metoda volumetrica de analiza a coroziunii
   5. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
3. Pentru placa de zinc:
   1. a fost degresata īn solutie de acid sulfuric;
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. a fost corodata īn solutie sulfuric;
   4. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   5. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   
   
4. Īn procesele de coroziune studiate:
   1. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   2. un gaz este eliberat numai la corodarea zincului;
   3. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   4. metalul isi schimba starea de oxidare pentru a deveni un cation;
   
   
5. Coroziunea metalelor:
   1. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   2. poate fi redusa prin galvanizare;
   3. este distrugerea metalelor sub actiunea factorilor externi;
   4. poate furniza materii prime utile pentru analiza;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. Theoretical mass of nickel deposited is calculated using:
   1. the conservation of the number of atoms for each element law;
   2. solutions laws;
   3. the electrolysis law;
   4. law of mass action;
   
   
2. The intensity of the current:
   1. should be adjusted by the technicians, we have nothing to do there;
   2. affect only the quality of the nickel deposition;
   3. is to be adjusted when the experiment starts;
   4. is to be calculated before to start the experiment;
   
   
3. Electrical conductivity of nickel salts solutions:
   1. depends on the potential of the source used;
   2. is relatively high;
   3. depends on the intensity of the current used;
   4. is reduced by salts additions;
   
   
4. It is expected to have a mass of nickel deposited:
   1. proportional with the intensity of the current used;
   2. inversely proportional with the nickel plating time;
   3. much higher than the calculated theoretical one;
   4. much lower than the calculated theoretical one;
   
   
5. At the nickel plating following reactions took place:
   1. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   2. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the cathode: O^2- - 2e^- -> O₂⁰
   3. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the anode: O^2- - 2e^- -> O₂⁰
   4. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Masa teoretica de nichel depus se calculeaza folosind:
   1. conservarea numarului de atomi pentru fiecare element;
   2. legea solutilor;
   3. legea electrolizei;
   4. legea actiunii maselor;
   5. legea conservarii energiei;
   
   
2. Intensitatea curentului:
   1. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   2. afecteaza numai calitatea depunerii nichelului;
   3. trebuie sa fie ajustata cand se incepe experimentul;
   4. trebuie sa fie calculata īnainte de a īncepe experimentul;
   
   
3. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. depinde de potentialul sursei utilizate;
   2. este relativ mare;
   3. depinde de intensitatea curentului utilizat;
   4. este redusa prin adaosuri de saruri;
   5. este relativ mica;
   
   
4. Este de asteptat ca masa de nichel depus sa fie:
   1. proportionala cu intensitatea curentului utilizat;
   2. invers proportional cu timpul de nichelare;
   3. mult mai mare decāt cea teoretica calculata;
   4. mult mai mica decāt cea teoretica calculata;
   5. mai mare decāt cea teoretica calculata;
   
   
5. La nichelare urmatoarele reactii au avut loc:
   1. la catod (-), īn legatura cu piesa metalica, Ni⁰ - 2e^- -> Ni²⁺
   2. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la catod: O^2- - 2e^- -> O₂⁰
   3. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la anod: O^2- - 2e^- -> O₂⁰
   4. la anod (+), īn contact cu piesa de nichel, Ni⁰ - 2e^- -> Ni²⁺
   5. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. Electrical conductivity of nickel salts solutions:
   1. is reduced by salts additions;
   2. is relatively high;
   3. is improved by salts additions;
   4. depends on the potential of the source used;
   
   
2. At the nickel plating following reactions took place:
   1. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   2. at anode (+), connected with nickel piece, Ni²⁺ + 2e^- -> Ni⁰
   3. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   4. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the anode: O^2- - 2e^- -> O₂⁰
   
   
3. It is expected to have a mass of nickel deposited:
   1. lower than the calculated theoretical one;
   2. inversely proportional with the intensity of the current used;
   3. inversely proportional with the nickel plating time;
   4. higher than the calculated theoretical one;
   
   
4. Theoretical mass of nickel deposited is calculated using:
   1. perfect gas law;
   2. solutions laws;
   3. the conservation of the energy law;
   4. the electrolysis law;
   
   
5. The intensity of the current:
   1. should be adjusted by the technicians, we have nothing to do there;
   2. does not affect the quality nor the quantity of the nickel deposition;
   3. is to be adjusted when the experiment starts;
   4. it depends on the surface of the sample;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este redusa prin adaosuri de saruri;
   2. este relativ mare;
   3. este īmbunatatita prin adaosuri de saruri;
   4. depinde de potentialul sursei utilizate;
   5. este relativ mica;
   
   
2. La nichelare urmatoarele reactii au avut loc:
   1. la anod (+), īn contact cu piesa de nichel, Ni⁰ - 2e^- -> Ni²⁺
   2. la anod (+), īn legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   3. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   4. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la anod: O^2- - 2e^- -> O₂⁰
   
   
3. Este de asteptat ca masa de nichel depus sa fie:
   1. mai mica decāt cea teoretica calculata;
   2. invers proportionala cu intensitatea curentului utilizat;
   3. invers proportional cu timpul de nichelare;
   4. mai mare decāt cea teoretica calculata;
   5. proportionala cu suprafata probei;
   
   
4. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea gazelor perfecte;
   2. legea solutilor;
   3. legea conservarii energiei;
   4. legea electrolizei;
   
   
5. Intensitatea curentului:
   1. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   2. nu afecteaza calitatea nici cantitatea nichelului depus;
   3. trebuie sa fie ajustata cand se incepe experimentul;
   4. depinde de suprafata probei;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. Theoretical mass of nickel deposited is calculated using:
   1. the electrolysis law;
   2. the conservation of the number of atoms for each element law;
   3. law of mass action;
   4. solutions laws;
   
   
2. Electrical conductivity of nickel salts solutions:
   1. depends on the intensity of the current used;
   2. is relatively high;
   3. is relatively small;
   4. depends on the potential of the source used;
   
   
3. It is expected to have a mass of nickel deposited:
   1. proportional with the surface of the sample;
   2. proportional with the intensity of the current used;
   3. proportional with the nickel plating time;
   4. inversely proportional with the nickel plating time;
   
   
4. The intensity of the current:
   1. is to be calculated before to start the experiment;
   2. affect only the quality of the nickel deposition;
   3. it depends on the surface of the sample;
   4. should be adjusted by the technicians, we have nothing to do there;
   
   
5. At the nickel plating following reactions took place:
   1. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the anode: O^2- - 2e^- -> O₂⁰
   2. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the cathode: O^2- - 2e^- -> O₂⁰
   3. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   4. at anode (+), connected with nickel piece, Ni²⁺ + 2e^- -> Ni⁰
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea electrolizei;
   2. conservarea numarului de atomi pentru fiecare element;
   3. legea actiunii maselor;
   4. legea solutilor;
   
   
2. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. depinde de intensitatea curentului utilizat;
   2. este relativ mare;
   3. este relativ mica;
   4. depinde de potentialul sursei utilizate;
   5. este redusa prin adaosuri de saruri;
   
   
3. Este de asteptat ca masa de nichel depus sa fie:
   1. proportionala cu suprafata probei;
   2. proportionala cu intensitatea curentului utilizat;
   3. proportionala cu timpul de nichelare;
   4. invers proportional cu timpul de nichelare;
   
   
4. Intensitatea curentului:
   1. trebuie sa fie calculata īnainte de a īncepe experimentul;
   2. afecteaza numai calitatea depunerii nichelului;
   3. depinde de suprafata probei;
   4. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   5. nu afecteaza calitatea nici cantitatea nichelului depus;
   
   
5. La nichelare urmatoarele reactii au avut loc:
   1. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la anod: O^2- - 2e^- -> O₂⁰
   2. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la catod: O^2- - 2e^- -> O₂⁰
   3. la catod (-), īn legatura cu piesa metalica, Ni⁰ - 2e^- -> Ni²⁺
   4. la anod (+), īn legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. At the nickel plating following reactions took place:
   1. at anode (+), connected with nickel piece, Ni²⁺ + 2e^- -> Ni⁰
   2. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   3. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the cathode: O^2- - 2e^- -> O₂⁰
   4. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the anode: O^2- - 2e^- -> O₂⁰
   
   
2. Theoretical mass of nickel deposited is calculated using:
   1. the conservation of the number of atoms for each element law;
   2. solutions laws;
   3. perfect gas law;
   4. the electrolysis law;
   
   
3. The intensity of the current:
   1. is to be adjusted when the experiment starts;
   2. it depends on the surface of the sample;
   3. is to be calculated after conducting the experiment;
   4. affect only the quality of the nickel deposition;
   
   
4. Electrical conductivity of nickel salts solutions:
   1. is improved by salts additions;
   2. is relatively small;
   3. is reduced by salts additions;
   4. is relatively high;
   
   
5. It is expected to have a mass of nickel deposited:
   1. lower than the calculated theoretical one;
   2. much higher than the calculated theoretical one;
   3. proportional with the nickel plating time;
   4. proportional with the surface of the sample;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. La nichelare urmatoarele reactii au avut loc:
   1. la anod (+), īn legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   2. la catod (-), īn legatura cu piesa metalica, Ni⁰ - 2e^- -> Ni²⁺
   3. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la catod: O^2- - 2e^- -> O₂⁰
   4. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la anod: O^2- - 2e^- -> O₂⁰
   
   
2. Masa teoretica de nichel depus se calculeaza folosind:
   1. conservarea numarului de atomi pentru fiecare element;
   2. legea solutilor;
   3. legea gazelor perfecte;
   4. legea electrolizei;
   5. legea actiunii maselor;
   
   
3. Intensitatea curentului:
   1. trebuie sa fie ajustata cand se incepe experimentul;
   2. depinde de suprafata probei;
   3. se calculeaza dupa efectuarea experimentului;
   4. afecteaza numai calitatea depunerii nichelului;
   
   
4. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este īmbunatatita prin adaosuri de saruri;
   2. este relativ mica;
   3. este redusa prin adaosuri de saruri;
   4. este relativ mare;
   
   
5. Este de asteptat ca masa de nichel depus sa fie:
   1. mai mica decāt cea teoretica calculata;
   2. mult mai mare decāt cea teoretica calculata;
   3. proportionala cu timpul de nichelare;
   4. proportionala cu suprafata probei;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. It is expected to have a mass of nickel deposited:
   1. lower than the calculated theoretical one;
   2. proportional with the nickel plating time;
   3. much higher than the calculated theoretical one;
   4. inversely proportional with the surface of the sample;
   
   
2. Electrical conductivity of nickel salts solutions:
   1. is improved by salts additions;
   2. is relatively small;
   3. depends on the intensity of the current used;
   4. depends on the potential of the source used;
   
   
3. The intensity of the current:
   1. affect only the quality of the nickel deposition;
   2. is to be calculated after conducting the experiment;
   3. is to be adjusted when the experiment starts;
   4. is to be calculated before to start the experiment;
   
   
4. At the nickel plating following reactions took place:
   1. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the cathode: O^2- - 2e^- -> O₂⁰
   2. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   3. at anode (+), connected with nickel piece, Ni²⁺ + 2e^- -> Ni⁰
   4. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   
   
5. Theoretical mass of nickel deposited is calculated using:
   1. perfect gas law;
   2. the conservation of the number of atoms for each element law;
   3. law of mass action;
   4. solutions laws;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Este de asteptat ca masa de nichel depus sa fie:
   1. mai mica decāt cea teoretica calculata;
   2. proportionala cu timpul de nichelare;
   3. mult mai mare decāt cea teoretica calculata;
   4. invers proportionala cu suprafata probei;
   
   
2. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este īmbunatatita prin adaosuri de saruri;
   2. este relativ mica;
   3. depinde de intensitatea curentului utilizat;
   4. depinde de potentialul sursei utilizate;
   5. este redusa prin adaosuri de saruri;
   
   
3. Intensitatea curentului:
   1. afecteaza numai calitatea depunerii nichelului;
   2. se calculeaza dupa efectuarea experimentului;
   3. trebuie sa fie ajustata cand se incepe experimentul;
   4. trebuie sa fie calculata īnainte de a īncepe experimentul;
   
   
4. La nichelare urmatoarele reactii au avut loc:
   1. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la catod: O^2- - 2e^- -> O₂⁰
   2. la catod (-), īn legatura cu piesa metalica, Ni⁰ - 2e^- -> Ni²⁺
   3. la anod (+), īn legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   4. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   5. la densitati mari de curent anionii de oxigen (O^2-) au tendinta de a descarca la anod: O^2- - 2e^- -> O₂⁰
   
   
5. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea gazelor perfecte;
   2. conservarea numarului de atomi pentru fiecare element;
   3. legea actiunii maselor;
   4. legea solutilor;
   5. legea conservarii energiei;