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

1. We may say the followings:
   1. diffusion process appears only in gaseous state;
   2. the kinetic energy of a molecule is affected by temperature and pressure;
   3. the kinetic energy of a molecule is affected by temperature only;
   4. the molecules have speeds only in gaseous and liquid states;
   
   
2. 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 concentrations of the solutions used;
   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;
   
   
3. At the ends of the tube following equilibrium reactions occurs:
   1. H₂O \=\ H⁺ + HO^-
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. H⁺ + HO^- \=\ H₂O
   4. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
4. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all have same speed;
   2. are considered to be at the same temperature, but may have different speeds;
   3. all are moving in the same direction;
   4. all have same energy;
   
   
5. The chronometer is used in the experiment for:
   1. indication of the moment when we should pay attention to the experiment;
   2. extracting the information necessary to calculate the speeds ratio;
   3. measuring of the diffusion time;
   4. to keep us busy;
   
   

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. proces de difuzie apare numai īn stare gazoasa;
   2. energia cinetica a unei molecule este afectata de temperatura si presiune;
   3. energia cinetica a unei molecule este afectata de numai temperatura;
   4. moleculele au viteze numai īn stare gazoasa si lichida;
   5. moleculele au energie īn toate starile gazoasa, lichida si solida;
   
   
2. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   2. concentratiile solutiilor utilizate;
   3. viteza la moda sau energia la moda a fiecarei specii implicate;
   4. latimea tubului si nu lungimea tubului;
   
   
3. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H₂O \=\ H⁺ + HO^-
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. H⁺ + HO^- \=\ H₂O
   4. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
4. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate au aceeasi viteza;
   2. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   3. toate se deplaseaza īn aceeasi directie;
   4. toate au aceeasi energie;
   5. toate se īndreapta īntr-o directie arbitrara;
   
   
5. Cronometrul este utilizat īn experimentul pentru:
   1. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   2. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   3. masurarea timpului de difuzie;
   4. sa ne tina ocupati;
   5. sincronizarea timpilor de difuzie;
   
   

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

1. The chronometer is used in the experiment for:
   1. to keep us busy;
   2. measuring of the diffusion time;
   3. synchronization of the diffusion times;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
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. NH₃ + HCl \=\ NH₄Cl
   
   
3. The position of the ring in the experiment is dependent on:
   1. the speed of diffusion of each involved species;
   2. the width of the tube and not of the length of the tube;
   3. the mode energy or mode speed of each involved species;
   4. the virtual speeds and not the real speeds of each involved species;
   
   
4. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory and our breathing;
   2. presence of the chlorine;
   3. unproper illumination in the laboratory or our breathing;
   4. presence of the ammonia;
   
   
5. 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 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 neutral molecules and not as ions;
   
   

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

1. Cronometrul este utilizat īn experimentul pentru:
   1. sa ne tina ocupati;
   2. masurarea timpului de difuzie;
   3. sincronizarea timpilor de difuzie;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   
   
2. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H⁺ + HO^- \=\ H₂O
   2. H₂O \=\ H⁺ + HO^-
   3. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   4. NH₃ + HCl \=\ NH₄Cl
   5. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
3. Pozitia inelului īn experimentul este dependenta de:
   1. viteza de difuzie a fiecarei specii implicate;
   2. latimea tubului si nu lungimea tubului;
   3. viteza la moda sau energia la moda a fiecarei specii implicate;
   4. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   5. concentratiile solutiilor utilizate;
   
   
4. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   2. prezentei clorului;
   3. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   4. prezentei amoniacului;
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. lungimea tubului si latimea tubului;
   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 si molecule neutre si nu ca si ioni;
   5. viteza de difuzie a fiecarei specii implicate;
   
   

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

1. We may say the followings:
   1. diffusion process appears only in gaseous state;
   2. the molecules have energy only in gaseous and liquid states;
   3. the kinetic energy of a molecule is affected by temperature only;
   4. the molecules have speeds in all gaseous, liquid and solid states;
   
   
2. The position of the ring in the experiment is dependent on:
   1. the length of the tube and the width of the tube;
   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 length of the tube and not of the width of the tube;
   
   
3. 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 are moving in the same direction;
   
   
4. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   2. H⁺ + HO^- \=\ H₂O
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. NH₃ + HCl \=\ NH₄Cl
   
   
5. 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 real speeds and not the virtual speeds of each involved species;
   3. the mode energy or mode speed of each involved species;
   4. the propagation of the species as neutral molecules and not as ions;
   
   

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. proces de difuzie apare numai īn stare gazoasa;
   2. moleculele au energie numai īn stare gazoasa si lichida;
   3. energia cinetica a unei molecule este afectata de numai temperatura;
   4. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   
   
2. Pozitia inelului īn experimentul este dependenta de:
   1. lungimea tubului si latimea tubului;
   2. energia medie sau viteza medie a fiecarei specii implicate;
   3. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   4. lungimea tubului si nu latimea tubului;
   5. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   
   
3. 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 se deplaseaza īn aceeasi directie;
   
   
4. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   2. H⁺ + HO^- \=\ H₂O
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. NH₃ + HCl \=\ NH₄Cl
   5. H₂O \=\ H⁺ + HO^-
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. propagarea speciilor ca ionii si nu ca si molecule neutre;
   2. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   3. viteza la moda sau energia la moda a fiecarei specii implicate;
   4. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   
   

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

1. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the diffusion coefficients;
   2. indication of the moment when we should pay attention to the experiment;
   3. to keep us busy;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
2. The position of the ring in the experiment is dependent on:
   1. the concentrations of the solutions used;
   2. the propagation of the species as neutral molecules and not as ions;
   3. the average energy or average speed of each involved species;
   4. the length of the tube and the width of the tube;
   
   
3. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory and our breathing;
   2. presence of the chlorine;
   3. unproper illumination in the laboratory or our breathing;
   4. our experiment designed to trap the product of the reaction;
   
   
4. We may say the followings:
   1. diffusion process appears only in gaseous and liquid states;
   2. diffusion process appears in all gaseous, liquid and solid states;
   3. the molecules have speeds only in gaseous state;
   4. the molecules have speeds in all gaseous, liquid and solid states;
   
   
5. The time to the formation of the ring in the experiment is dependent on:
   1. the propagation of the species as neutral molecules and not as ions;
   2. the length of the tube and not of the width of the tube;
   3. the concentrations of the solutions used;
   4. the length of the tube and the width of the tube;
   
   

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

1. Cronometrul este utilizat īn experimentul pentru:
   1. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   2. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   3. sa ne tina ocupati;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   5. sincronizarea timpilor de difuzie;
   
   
2. Pozitia inelului īn experimentul este dependenta de:
   1. concentratiile solutiilor utilizate;
   2. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   3. energia medie sau viteza medie a fiecarei specii implicate;
   4. lungimea tubului si latimea tubului;
   
   
3. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   2. prezentei clorului;
   3. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   4. experimentului nostru proiectat pentru a captura produsul de reactie;
   
   
4. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. proces de difuzie apare numai īn stare gazoasa si lichida;
   2. proces de difuzie apare īn toate starile gazoasa, lichida si solida;
   3. moleculele au viteze numai īn stare gazoasa;
   4. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   2. lungimea tubului si nu latimea tubului;
   3. concentratiile solutiilor utilizate;
   4. lungimea tubului si latimea tubului;
   5. viteza de difuzie a fiecarei specii implicate;
   
   

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

1. The position of the ring in the experiment is dependent on:
   1. the real speeds and not the virtual speeds of each involved species;
   2. the average energy or average speed of each involved species;
   3. the virtual speeds and not the real speeds of each involved species;
   4. the concentrations of the solutions used;
   
   
2. 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 speeds;
   2. all are moving in an arbitrary direction;
   3. all are moving in the same direction;
   4. are considered to be at the same temperature, but may have different energies;
   
   
3. The chronometer is used in the experiment for:
   1. synchronization of the diffusion times;
   2. to keep us busy;
   3. measuring of the diffusion time;
   4. indication of the moment when we should pay attention to the experiment;
   
   
4. The time to the formation of the ring in the experiment is dependent on:
   1. the virtual speeds and not the real speeds of each involved species;
   2. the propagation of the species as neutral molecules and not as ions;
   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. We may say the followings:
   1. the molecules have speeds in all gaseous, liquid and solid states;
   2. the molecules have energy only in gaseous and liquid states;
   3. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   4. diffusion process appears only in gaseous state;
   
   

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

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

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

1. For gaseous state:
   1. it exists an equation for all, p · V = n · R · T;
   2. the pressure is subject to change when a chemical reaction occurs;
   3. the pressure is much lower than in liquid state;
   4. the pressure is exactly the same as in liquid state;
   
   
2. In the laboratory were studied:
   1. increasing of the temperature of a solid mass when was heated;
   2. increasing of the pressure of a gas when was heated;
   3. the producing of some gas as result of a lost of the mass of a solid;
   4. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   
   
3. The values taken from the experiment conducted in the laboratory indicated that:
   1. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   2. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   3. the ideal model of a gas approximated the best the behavior of the released gas;
   4. air were released as result of the decomposition;
   
   
4. A state equation for a real gas is:
   1. a relation which takes into account certain deviations from the ideal model;
   2. usable in the laboratory, but is not to be used somewhere else;
   3. a relation derived to approximate the relation between state parameters;
   4. a relation which is always true, independent of the values of the state parameters;
   
   
5. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O₂ -> H₂O + O₂;
   2. H₂O + O₂ -> H₂O₂;
   3. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pentru stare gazoasa:
   1. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   2. presiunea se pot modifica atunci cānd apare o reactie chimica;
   3. presiunea este mult mai mica decāt īn stare lichida;
   4. presiunea este exact la fel ca si īn stare lichida;
   
   
2. Īn laborator s-au studiat:
   1. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   2. cresterea presiunii unui gaz cānd s-a īncalzit;
   3. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   
   
3. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   2. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   4. aer a fost eliberat ca urmare a descompunerii;
   5. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   
   
4. O ecuatie de stare pentru un gaz real este:
   1. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   2. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   3. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   4. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   
   
5. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O₂ -> H₂O + O₂;
   2. H₂O + O₂ -> H₂O₂;
   3. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   

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

1. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. Ag + O₂ -> Ag₂O;
   2. KClO₃ -> KCl + O₂;
   3. H₂O₂ -> H₂O + O₂;
   4. KNO₂ + O₂ -> KNO₃;
   
   
2. In the laboratory were studied:
   1. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   2. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   3. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   4. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   
   
3. The values taken from the experiment conducted in the laboratory indicated that:
   1. air were released as result of the decomposition;
   2. we possess enough information to decide what gas was released from the reaction;
   3. we do not possess enough information to decide what gas was released from the reaction;
   4. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   
   
4. For gaseous state:
   1. it exists an equation for all, p · V = n · R · T;
   2. the pressure is exactly the same as in liquid state;
   3. the pressure is subject to change when a chemical reaction occurs;
   4. the pressure is much higher than in liquid state;
   
   
5. A state equation for a real gas is:
   1. a relation derived to approximate the relation between state parameters;
   2. a relation which may involve some constants dependent of gas composition;
   3. a relation obtained after conducting of the experiment;
   4. a relation which is always true, independent of the values of the state parameters;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. Ag + O₂ -> Ag₂O;
   2. KClO₃ -> KCl + O₂;
   3. H₂O₂ -> H₂O + O₂;
   4. KNO₂ + O₂ -> KNO₃;
   
   
2. Īn laborator s-au studiat:
   1. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   2. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   
   
3. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. aer a fost eliberat ca urmare a descompunerii;
   2. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   3. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   4. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   5. oxigenul au fost eliberat ca urmare a descompunerii;
   
   
4. Pentru stare gazoasa:
   1. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   2. presiunea este exact la fel ca si īn stare lichida;
   3. presiunea se pot modifica atunci cānd apare o reactie chimica;
   4. presiunea este mult mai mare decāt īn stare lichida;
   5. presiunea este mult mai mica decāt īn stare lichida;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   2. o relatie care poate implica unele constante dependente de compozitia gazului;
   3. o relatie obtinut dupa efectuarea experimentului;
   4. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   5. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   
   

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

1. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O₂ -> H₂O + O₂;
   2. KNO₃ -> KNO₂ + O₂;
   3. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   
2. The values taken from the experiment conducted in the laboratory indicated that:
   1. ozone 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 best the behavior of the released gas;
   4. air were released as result of the decomposition;
   
   
3. In the laboratory were studied:
   1. the lost of the mass of a solid as result of producing of some gas;
   2. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   3. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   4. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   
   
4. For gaseous state:
   1. we need to take supplementary precautions in the laboratory;
   2. the pressure is unchanged when a chemical reaction occurs;
   3. the pressure is exactly the same as in liquid state;
   4. the pressure depends on the model which are used to approximate it;
   
   
5. A state equation for a real gas is:
   1. a relation which may involve some constants dependent of gas composition;
   2. usable in the laboratory, but is not to be used somewhere else;
   3. a relation which takes into account certain deviations from the ideal model;
   4. a relation obtained after conducting of the experiment;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O₂ -> H₂O + O₂;
   2. KNO₃ -> KNO₂ + O₂;
   3. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   5. Ag₂O -> Ag + O₂;
   
   
2. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. ozonul 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 bine comportamentul gazului eliberat;
   4. aer a fost eliberat ca urmare a descompunerii;
   
   
3. Īn laborator s-au studiat:
   1. pierdut din masa de solid ca urmare a producerii unor gaze;
   2. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   3. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   5. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   
   
4. Pentru stare gazoasa:
   1. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   2. presiunea este neschimbata cānd apare o reactie chimica;
   3. presiunea este exact la fel ca si īn stare lichida;
   4. presiunea depinde de modelul care este utilizat pentru o aproxima;
   5. presiunea este mult mai mare decāt īn stare lichida;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie care poate implica unele constante dependente de compozitia gazului;
   2. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   3. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   4. o relatie obtinut dupa efectuarea experimentului;
   
   

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. ozone were released as result of the decomposition;
   2. we 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. the ideal model of a gas approximated the best the behavior of the released gas;
   
   
2. A state equation for a real gas is:
   1. a relation between an unlimited number of state parameters;
   2. a relation obtained after conducting of the experiment;
   3. usable in the laboratory, but is not to be used somewhere else;
   4. a relation which is always true, independent of the values of the state parameters;
   
   
3. For gaseous state:
   1. the pressure is much higher than in liquid state;
   2. the pressure depends on the model which are used to approximate it;
   3. the pressure is unchanged when a chemical reaction occurs;
   4. the pressure is subject to change when a chemical reaction occurs;
   
   
4. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O₂ -> H₂O + O₂;
   2. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   3. H₂O + O₂ -> H₂O₂;
   4. Ag + O₂ -> Ag₂O;
   
   
5. 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. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   4. the producing of some gas as result of a lost of the mass of a solid;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. ozonul au fost eliberat ca urmare a descompunerii;
   2. 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. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   5. aer a fost eliberat ca urmare a descompunerii;
   
   
2. O ecuatie de stare pentru un gaz real este:
   1. o relatie īntre un numar nelimitat de parametri de stare;
   2. o relatie obtinut dupa efectuarea experimentului;
   3. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   4. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   5. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   
   
3. Pentru stare gazoasa:
   1. presiunea este mult mai mare decāt īn stare lichida;
   2. presiunea depinde de modelul care este utilizat pentru o aproxima;
   3. presiunea este neschimbata cānd apare o reactie chimica;
   4. presiunea se pot modifica atunci cānd apare o reactie chimica;
   5. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O₂ -> H₂O + O₂;
   2. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   3. H₂O + O₂ -> H₂O₂;
   4. Ag + O₂ -> Ag₂O;
   5. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   
5. 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. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   4. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   
   

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. oxigen were released as result of the decomposition;
   2. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   3. we possess enough information to decide what gas was released from the reaction;
   4. the ideal model of a gas approximated the worst the behavior of the released gas;
   
   
2. For gaseous state:
   1. the pressure is exactly the same as 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 is much lower than in liquid state;
   
   
3. In the laboratory were studied:
   1. the producing of some gas as result of a lost of the mass of a solid;
   2. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   3. increasing of the temperature of a solid mass when was heated;
   4. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   
   
4. A state equation for a real gas is:
   1. a relation derived to approximate the relation between state parameters;
   2. a relation which takes into account certain deviations from the ideal model;
   3. a relation between an unlimited number of state parameters;
   4. a relation obtained after conducting of the experiment;
   
   
5. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. opening a bubble water bottle;
   2. distillation of the liquid air;
   3. H₂O₂ -> H₂O + O₂;
   4. KNO₂ + O₂ -> KNO₃;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. oxigenul au fost eliberat ca urmare a descompunerii;
   2. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   4. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   
   
2. Pentru stare gazoasa:
   1. presiunea este exact la fel ca si 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 este mult mai mica decāt īn stare lichida;
   5. presiunea depinde de modelul care este utilizat pentru o aproxima;
   
   
3. Īn laborator s-au studiat:
   1. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   2. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   3. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   4. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   5. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   
   
4. O ecuatie de stare pentru un gaz real este:
   1. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   2. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   3. o relatie īntre un numar nelimitat de parametri de stare;
   4. o relatie obtinut dupa efectuarea experimentului;
   5. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   
   
5. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. deschiderea unei sticle de apa cu bule;
   2. distilarea aerului lichid;
   3. H₂O₂ -> H₂O + O₂;
   4. KNO₂ + O₂ -> KNO₃;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When lead is identified:
   1. a yellow complex appears;
   2. a red-brown complex appears;
   3. a violet complex appears;
   4. a heat release is observed;
   
   
2. Why moisten the paper with solution of sodium nitrate?
   1. for stopping after a while the chemical reaction that takes place;
   2. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   3. to accomodate ourselves to use chemicals;
   4. to be cut easily with scissors;
   
   
3. 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 alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   4. the presence of other ions may produce a false negative outcome;
   
   
4. The paper requires before analysis of the sample:
   1. to be burned;
   2. to be acidified;
   3. to be tested;
   4. to be moistened with an electrolyte;
   
   
5. When the electrical circuit is closed:
   1. surface of the sample is fastly covered by a protecting shield of electrons;
   2. anions from the solution are passed into sample as metals;
   3. elements from the metals are passed into solution as anions;
   4. cations from the solution are passed into sample as metals;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd plumbul este identificat:
   1. apare un complex galben;
   2. apare un complex rosu-brun;
   3. apare un complex violet;
   4. se observa o eliberare de caldura;
   
   
2. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru oprirea dupa un timp reactiei chimice care are loc;
   2. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   3. sa ne acomodam in a utiliza substante chimice;
   4. sa fie taiat cu usurinta cu foarfeca;
   
   
3. Cānd aluminiu este identificat:
   1. prezenta altor ioni poate produce un rezultat fals pozitiv;
   2. este identificat ca cationul Al²⁺;
   3. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   4. prezenta altor ioni poate produce un rezultat fals negativ;
   5. este identificat ca cationul Al¹⁺;
   
   
4. Hartia necesita ca īnainte de analiza probei:
   1. sa fie arsa;
   2. sa fie acidulata;
   3. sa fie testata;
   4. sa fie umezita cu un electrolit;
   
   
5. Cānd circuitul electric este īnchis:
   1. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   2. anionii din solutie sunt trecuti īn proba ca metale;
   3. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   4. cationii din solutie sunt trecuti īn proba ca metale;
   5. curent electric evita proba si hārtia;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. This method of analysis of metals and alloys is:
   1. a destructive method of analysis;
   2. a quantitative method of analysis;
   3. useful for alloys, not so useful for metals;
   4. a gravimetric method of analysis;
   
   
2. When lead is identified:
   1. precautions should be made for toxic wastes disposal;
   2. a heat release is observed;
   3. a red-brown complex appears;
   4. dangerous substances are used;
   
   
3. The paper requires before analysis of the sample:
   1. to be tested;
   2. to be dry;
   3. to be acidified;
   4. to be weighted;
   
   
4. When the electrical circuit is closed:
   1. anions from the solution are passed into sample as metals;
   2. elements from the metals are passed into solution as anions;
   3. water dissociation is inhibited;
   4. electric current avoids the sample and the paper;
   
   
5. Why moisten the paper with solution of sodium nitrate?
   1. to accomodate ourselves to use chemicals;
   2. for stopping after a while the chemical reaction that takes place;
   3. to have something to do in the laboratory;
   4. for the paper to work as isolator;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Aceasta metoda de analiza de metale si aliaje este:
   1. o metoda distructiva de analiza;
   2. o metoda cantitativa de analiza;
   3. utila pentru aliaje, nu atāt de utila pentru metale;
   4. o metoda gravimetrica de analiza;
   5. prea veche pentru a fi utilizata īn prezent īn laborator;
   
   
2. Cānd plumbul este identificat:
   1. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   2. se observa o eliberare de caldura;
   3. apare un complex rosu-brun;
   4. sunt utilizate substante periculoase;
   5. interferenta altor ioni poate afecta rezultatul;
   
   
3. Hartia necesita ca īnainte de analiza probei:
   1. sa fie testata;
   2. sa fie uscata;
   3. sa fie acidulata;
   4. sa fie cantarita;
   5. sa fie taiata īn bucati mici;
   
   
4. Cānd circuitul electric este īnchis:
   1. anionii din solutie sunt trecuti īn proba ca metale;
   2. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   3. disocierea apei este inhibata;
   4. curent electric evita proba si hārtia;
   
   
5. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. sa ne acomodam in a utiliza substante chimice;
   2. pentru oprirea dupa un timp reactiei chimice care are loc;
   3. pentru a avea ceva de a face īn laborator;
   4. pentru ca hartia sa actioneze ca izolator;
   5. sa fie taiat cu usurinta cu foarfeca;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   
   
2. When the electrical circuit is closed:
   1. anions 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;
   
   
3. 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. too ancient to be used today in the laboratory;
   
   
4. Why moisten the paper with solution of sodium nitrate?
   1. to provide cations for analysis;
   2. to have something to do in the laboratory;
   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;
   
   
5. When aluminum is identified:
   1. is identified as Al²⁺ cation;
   2. the presence of other ions may produce a true negative outcome;
   3. using of alizarin along with ammonium hidroxide provide a red colored complex;
   4. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   
   
2. Cānd circuitul electric este īnchis:
   1. anionii 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;
   
   
3. 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. prea veche pentru a fi utilizata īn prezent īn laborator;
   
   
4. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru furniza cationi pentru analiza;
   2. pentru a avea ceva de a face īn laborator;
   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;
   
   
5. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al²⁺;
   2. prezenta altor ioni poate produce un rezultat adevarat negativ;
   3. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   4. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. This method of analysis of metals and alloys is:
   1. a nondestructive method of analysis;
   2. useful for both metals and alloys;
   3. useful for pure metals, not so useful for alloys;
   4. a gravimetric method of analysis;
   
   
2. The paper requires before analysis of the sample:
   1. to be weighted;
   2. to be moistened with an electrolyte;
   3. to be acidified;
   4. to be cut in small pieces;
   
   
3. When lead is identified:
   1. interference of other ions may affect the outcome;
   2. a blue complex appears;
   3. a yellow complex appears;
   4. the reactions used clearly indicates its presence;
   
   
4. Why moisten the paper with solution of sodium nitrate?
   1. for the paper to work as isolator;
   2. to provide cations for analysis;
   3. to have something to do in the laboratory;
   4. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   
   
5. When aluminum is identified:
   1. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   2. only one identification reaction is possible;
   3. the presence of other ions may produce a false positive outcome;
   4. is identified as Al³⁺ cation;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Aceasta metoda de analiza de metale si aliaje este:
   1. o metoda nedistructiva de analiza;
   2. utila atāt pentru metale si aliaje;
   3. utila pentru metale pure, nu atāt de utila pentru aliaje;
   4. o metoda gravimetrica de analiza;
   
   
2. Hartia necesita ca īnainte de analiza probei:
   1. sa fie cantarita;
   2. sa fie umezita cu un electrolit;
   3. sa fie acidulata;
   4. sa fie taiata īn bucati mici;
   5. sa fie testata;
   
   
3. Cānd plumbul este identificat:
   1. interferenta altor ioni poate afecta rezultatul;
   2. apare un complex albastru;
   3. apare un complex galben;
   4. reactiile utilizate īn mod clar ii indica prezenta;
   5. se observa o eliberare de caldura;
   
   
4. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru ca hartia sa actioneze ca izolator;
   2. pentru furniza cationi pentru analiza;
   3. pentru a avea ceva de a face īn laborator;
   4. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   
   
5. Cānd aluminiu este identificat:
   1. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   2. doar o reactie de identificare este posibila;
   3. prezenta altor ioni poate produce un rezultat fals pozitiv;
   4. este identificat ca cationul Al³⁺;
   5. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When lead is identified:
   1. the reactions used clearly indicates its presence;
   2. a blue complex appears;
   3. a heat release is observed;
   4. interference of other ions may affect the outcome;
   
   
2. This method of analysis of metals and alloys is:
   1. useful for pure metals, not so useful for alloys;
   2. a destructive method of analysis;
   3. useful for both metals and alloys;
   4. a gravimetric method of analysis;
   
   
3. Why moisten the paper with solution of sodium nitrate?
   1. to be cut easily with scissors;
   2. for stopping after a while the chemical reaction that takes place;
   3. for the paper to work as isolator;
   4. to accomodate ourselves to use chemicals;
   
   
4. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   3. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
5. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as anions;
   2. elements from the solution are passed into sample as metals;
   3. anions from the solution are passed into sample as metals;
   4. water dissociation is inhibited;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd plumbul este identificat:
   1. reactiile utilizate īn mod clar ii indica prezenta;
   2. apare un complex albastru;
   3. se observa o eliberare de caldura;
   4. interferenta altor ioni poate afecta rezultatul;
   
   
2. Aceasta metoda de analiza de metale si aliaje este:
   1. utila pentru metale pure, nu atāt de utila pentru aliaje;
   2. o metoda distructiva de analiza;
   3. utila atāt pentru metale si aliaje;
   4. o metoda gravimetrica de analiza;
   5. utila pentru aliaje, nu atāt de utila pentru metale;
   
   
3. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. sa fie taiat cu usurinta cu foarfeca;
   2. pentru oprirea dupa un timp reactiei chimice care are loc;
   3. pentru ca hartia sa actioneze ca izolator;
   4. sa ne acomodam in a utiliza substante chimice;
   
   
4. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   3. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   5. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
5. Cānd circuitul electric este īnchis:
   1. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   2. elemente din solutie sunt trecute īn proba ca metale;
   3. anionii din solutie sunt trecuti īn proba ca metale;
   4. disocierea apei este inhibata;
   5. curent electric trece prin proba si hārtie;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. Titration as a laboratory operation involves:
   1. a natrium hydroxide solution;
   2. an mixing of two ore more solutions;
   3. a burette;
   4. a mass measurement;
   
   
2. The density of the solutions depends on:
   1. provider;
   2. time elapsed since were prepared;
   3. pressure;
   4. temperature;
   
   
3. The following chemical reactions were used in the experiments:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. H₂O + CO₂ -> H₂CO₃
   3. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
4. The equivalence point is:
   1. indicated when a color change is observed into the solution;
   2. the point in which a reactive is fully consumed in the reaction;
   3. the point in which a reactive should be added in the reaction flask;
   4. used to balance the equation;
   
   
5. Reactions between acids and bases:
   1. always have as a consequence the formation of a quantity of water;
   2. have as a consequence the dissolution of a salt;
   3. have as effect the change of the color of a solution;
   4. are all exothermic, being therefore dangerous outside of the laboratory;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Titrarea ca o operatiune de laborator implica:
   1. o solutie de hidroxid de sodiu;
   2. amestecul a doua sau mai multe solutii;
   3. o biureta;
   4. masurarea masei;
   5. o solutie de acid sulfuric;
   
   
2. Densitatea solutiilor depinde de:
   1. furnizor;
   2. timpul scurs de cand au fost pregatite;
   3. presiune;
   4. temperatura;
   
   
3. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. H₂O + CO₂ -> H₂CO₃
   3. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
4. Punctul de echivalenta este:
   1. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   2. punctul īn care un reactiv este consumat complet īn reactie;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   4. folosit pentru a echilibra ecuatia;
   
   
5. Reactiile īntre acizi si baze:
   1. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   2. au drept consecinta dizolvarea unei sari;
   3. au ca efect schimbarea culorii unei solutii;
   4. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The equivalence point is:
   1. the point in which a reactive is fully consumed in the reaction;
   2. indicated when a color change is observed into the solution;
   3. the point in which a reactive should be added in the burette;
   4. something rarely encountered in chemistry;
   
   
2. The following chemical reactions were used in the experiments:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   3. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. H₂O + CO₂ -> H₂CO₃
   
   
3. A redox process:
   1. occurs only when we mix wrong substances in the laboratory;
   2. involves a transfer of electrons from one atom or group of atoms to another;
   3. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. involves changing of the aggregation states of some participants to the reaction;
   
   
4. The density of the solutions depends on:
   1. pressure;
   2. temperature;
   3. provider;
   4. concentration;
   
   
5. 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 volume;
   3. the liquid in the burette should be at the same level before and after conducting the experiment;
   4. all glassware should be clean before and after conducting the experiment;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Punctul de echivalenta este:
   1. punctul īn care un reactiv este consumat complet īn reactie;
   2. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   4. ceva rar īntālnit īn chimie;
   5. folosit pentru a echilibra ecuatia;
   
   
2. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   3. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. H₂O + CO₂ -> H₂CO₃
   5. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
3. Un proces redox:
   1. apare numai atunci cānd se amesteca substante gresit īn laborator;
   2. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   3. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   
   
4. Densitatea solutiilor depinde de:
   1. presiune;
   2. temperatura;
   3. furnizor;
   4. concentratie;
   5. cantitate;
   
   
5. 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 volumului;
   3. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   4. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. 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. all glassware should be clean before and after conducting the experiment;
   
   
2. A redox process:
   1. involves changing of the oxidation states of some participants to the reaction;
   2. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. involves a transfer of electrons from one atom or group of atoms to another;
   4. involves changing of the aggregation states of some participants to the reaction;
   
   
3. Reactions between acids and bases:
   1. are all exothermic, being therefore dangerous outside of the laboratory;
   2. are always fast, taking place almost instantaneously;
   3. have as effect the change of the color of a solution;
   4. are rarely useful, and even rarely used;
   
   
4. The equivalence point is:
   1. the point in which a reactive should be added in the burette;
   2. indicated when a color change is observed into the solution;
   3. used to balance the equation;
   4. the point in which a reactive is fully consumed in the reaction;
   
   
5. The density of the solutions depends on:
   1. provider;
   2. time elapsed since were prepared;
   3. quantity;
   4. concentration;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. 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. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   5. principiul conservarii volumului;
   
   
2. Un proces redox:
   1. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   2. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   4. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   5. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
3. Reactiile īntre acizi si baze:
   1. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   2. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   3. au ca efect schimbarea culorii unei solutii;
   4. sunt rareori utile, si chiar mai rar utilizate;
   5. au drept consecinta dizolvarea unei sari;
   
   
4. Punctul de echivalenta este:
   1. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   2. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   3. folosit pentru a echilibra ecuatia;
   4. punctul īn care un reactiv este consumat complet īn reactie;
   
   
5. Densitatea solutiilor depinde de:
   1. furnizor;
   2. timpul scurs de cand au fost pregatite;
   3. cantitate;
   4. concentratie;
   5. presiune;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The following chemical reactions were used in the experiments:
   1. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   2. H₂O + CO₂ -> H₂CO₃
   3. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
2. 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. indicated when a color change is observed into the solution;
   4. used to balance the equation;
   
   
3. The indicator should be added:
   1. to provide a color change at equivalence point;
   2. in small quantities, to avoid the errors in observations and in calculations;
   3. only at the suggestion of the supervisor;
   4. only in special cases, when the burette is graded from its bottom to its top;
   
   
4. In the calculations:
   1. are necessary to establish the coefficients of the chemical reaction;
   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 draw the tables in our notebooks after completing of the experiment;
   
   
5. A redox process:
   1. involves changing of the oxidation states of some participants to the reaction;
   2. involves a transfer of electrons from one atom or group of atoms to another;
   3. is always fast and safe;
   4. involves changing of the aggregation states of some participants to the reaction;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   2. H₂O + CO₂ -> H₂CO₃
   3. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
2. 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. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   4. folosit pentru a echilibra ecuatia;
   
   
3. Trebuie adaugat indicatorul:
   1. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   2. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   3. numai la sugestia supraveghetorului;
   4. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   
   
4. In calcule:
   1. este necesara stabilirea coeficientilor reactiei chimice;
   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 sa desenam tabelele in caiete dupa finalizarea experimentului;
   
   
5. Un proces redox:
   1. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   2. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   3. este īntotdeauna rapid si sigur;
   4. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   5. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. 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, after and during the experiment;
   3. the principle of the conservation of the energy;
   4. the liquid in the burette should be at the same level before and after conducting the experiment;
   
   
2. In the calculations:
   1. are necessary to use our phones;
   2. are necessary to use some formulas expressing in different ways the concentration;
   3. are necessary to discuss with our colleagues;
   4. are necessary to take some information from reagent bottles;
   
   
3. Reactions between acids and bases:
   1. are rarely useful, and even rarely used;
   2. have as effect the change of the color of a solution;
   3. have as a consequence the dissolution of a salt;
   4. are all exothermic, being therefore dangerous outside of the laboratory;
   
   
4. The equivalence point is:
   1. indicated when a color change is observed into the solution;
   2. used to balance the equation;
   3. the point in which a reactive should be added in the reaction flask;
   4. the point in which a reactive should be added in the burette;
   
   
5. The following chemical reactions were used in the experiments:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. H₂O + CO₂ -> H₂CO₃
   4. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. 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, dupa, si īn timpul experimentului;
   3. principiul conservarii energiei;
   4. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   5. principiul conservarii volumului;
   
   
2. In calcule:
   1. este necesar sa utilizam telefoanele;
   2. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   3. este necesar sa discutam cu colegii;
   4. este necesar a se lua unele informatii de pe sticlele de reactivi;
   5. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   
   
3. Reactiile īntre acizi si baze:
   1. sunt rareori utile, si chiar mai rar utilizate;
   2. au ca efect schimbarea culorii unei solutii;
   3. au drept consecinta dizolvarea unei sari;
   4. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   
   
4. Punctul de echivalenta este:
   1. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   2. folosit pentru a echilibra ecuatia;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   4. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   
   
5. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. H₂O + CO₂ -> H₂CO₃
   4. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   5. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   

FINAL TEST AT LABORATORY
Water analysis

1. In the laboratory were analyzed:
   1. the hardness of the water;
   2. the mass of the water;
   3. the acidity of the water;
   4. the alkalinity of the water;
   
   
2. For a water sample following measures may be quantitatively expressed:
   1. color;
   2. hardness;
   3. mineral acidity;
   4. total acidity;
   
   
3. We may say the followings:
   1. purification of the water may include chemical processes;
   2. water is a good polar solvent;
   3. when water contains dissolved minerals and gases is bad for drinking;
   4. water is good for drinking, it is nothing to be analysed;
   
   
4. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   
5. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   2. HCl + CO₃^2- -> HCO₃^- + Cl^-
   3. HCl + HO^- -> H₂O + Cl^-
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Īn laborator au fost analizate:
   1. duritatea apei;
   2. masa apei;
   3. aciditatea apei;
   4. alcalinitatea apei;
   5. solubilitatea apei;
   
   
2. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. culoare;
   2. duritate;
   3. aciditate minerala;
   4. aciditate totala;
   
   
3. Putem spune urmatoarele:
   1. purificarea apei poate include procese chimice;
   2. apa este un solvent polar bun;
   3. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   4. apa este buna pentru consum, nu este nimic de a fi analizat;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   5. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   2. HCl + CO₃^2- -> HCO₃^- + Cl^-
   3. HCl + HO^- -> H₂O+Cl^-
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   

FINAL TEST AT LABORATORY
Water analysis

1. We may say the followings:
   1. water is pure only when is taken from a good freshwater mountain stream;
   2. purification of the water may include biological processes;
   3. when water contains dissolved minerals and gases is bad for drinking;
   4. purification of the water may include physical processes;
   
   
2. For a water sample following measures may be quantitatively expressed:
   1. purity;
   2. color;
   3. mineral acidity;
   4. hardness;
   
   
3. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + HO^- -> H₂O + Cl^-
   2. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   3. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   4. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   
   
4. In the laboratory were analyzed:
   1. the concentration of the water;
   2. the color of the water;
   3. the mass of the water;
   4. the softness of the water;
   
   
5. In the laboratory the water were:
   1. hardened using the resin column;
   2. biologically purified using the resin column;
   3. complexed by using EDTA titrimetric method;
   4. acidified for drinking purposes;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Putem spune urmatoarele:
   1. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   2. purificarea apei poate include procese biologice;
   3. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   4. purificarea apei poate include procedee fizice;
   
   
2. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. puritate;
   2. culoare;
   3. aciditate minerala;
   4. duritate;
   5. alcalinitate permanenta;
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + HO^- -> H₂O + Cl^-
   2. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   3. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   4. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   
   
4. Īn laborator au fost analizate:
   1. concentratia apei;
   2. culoarea apei;
   3. masa apei;
   4. moliciunea apei;
   
   
5. In laborator apa au fost:
   1. calita folosind coloana de rasina;
   2. purificata biologic utilizānd coloana de rasina;
   3. complexata prin metoda titrimetrica EDTA;
   4. acidulata pentru baut;
   5. alcalinizeaza pentru baut;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. In the laboratory the water were:
   1. hardened using the resin column;
   2. complexed by using EDTA titrimetric method;
   3. biologically purified using the resin column;
   4. softened using the resin column;
   
   
2. For a water sample following measures may be quantitatively expressed:
   1. total acidity;
   2. permanent alkalinity;
   3. color;
   4. total alkalinity;
   
   
3. EDTA is used:
   1. for indication of the equilibrium point in the reaction;
   2. for recharging of the resin for water softening;
   3. as reagent for determining the hardness of the water;
   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 + CO₃^2- -> HCO₃^- + Cl^-
   2. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   3. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
5. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + Cl⁺ -> NaCl + HO⁺
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + Cl^- -> NaCl + HO^-
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. In laborator apa au fost:
   1. calita folosind coloana de rasina;
   2. complexata prin metoda titrimetrica EDTA;
   3. purificata biologic utilizānd coloana de rasina;
   4. dedurizata folosind coloana de rasina;
   5. alcalinizeaza pentru baut;
   
   
2. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. aciditate totala;
   2. alcalinitate permanenta;
   3. culoare;
   4. alcalinitate totala;
   
   
3. EDTA este utilizat:
   1. pentru indicarea punctului de echilibru īn reactie;
   2. pentru reīncarcarea rasinii la dedurizarea apei;
   3. ca reactiv pentru determinarea duritatii apei;
   4. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   5. ca masura de siguranta;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + CO₃^2- -> HCO₃^- + Cl^-
   2. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   3. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   5. HCl + HO^- -> H₂O+Cl^-
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + Cl⁺ -> NaCl + HO⁺
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + Cl^- -> NaCl + HO^-
   5. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   
2. In the laboratory the water were:
   1. alkalinized for drinking purposes;
   2. softened using the resin column;
   3. acidified for drinking purposes;
   4. complexed by using EDTA titrimetric method;
   
   
3. For a water sample following measures may be quantitatively expressed:
   1. permanent alkalinity;
   2. total acidity;
   3. color;
   4. hardness;
   
   
4. In the laboratory were analyzed:
   1. the acidity of the water;
   2. the hardness of the water;
   3. the softness of the water;
   4. the temperature of the water;
   
   
5. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   2. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   3. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   5. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   
   
2. In laborator apa au fost:
   1. alcalinizeaza pentru baut;
   2. dedurizata folosind coloana de rasina;
   3. acidulata pentru baut;
   4. complexata prin metoda titrimetrica EDTA;
   
   
3. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. alcalinitate permanenta;
   2. aciditate totala;
   3. culoare;
   4. duritate;
   
   
4. Īn laborator au fost analizate:
   1. aciditatea apei;
   2. duritatea apei;
   3. moliciunea apei;
   4. temperatura apei;
   5. masa apei;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   2. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   3. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   5. HCl + CO₃^2- -> HCO₃^- + Cl^-
   
   

FINAL TEST AT LABORATORY
Water analysis

1. We may say the followings:
   1. water is good for drinking, it is nothing to be analysed;
   2. purification of the water may include biological processes;
   3. purification of the water may include labeling processes;
   4. water is a good polar solvent;
   
   
2. EDTA is used:
   1. for complexing of Na¹⁺ and K¹⁺ ions;
   2. as reagent for determining the hardness of the water;
   3. for indication of the equilibrium point in the reaction;
   4. for safety precautions purposes;
   
   
3. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   
4. For a water sample following measures may be quantitatively expressed:
   1. hardness;
   2. color;
   3. total alkalinity;
   4. permanent alkalinity;
   
   
5. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   2. NaOH + HCOO⁺ -> HCOONa + HO⁺
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + HCOO^- -> HCOONa + HO^-
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Putem spune urmatoarele:
   1. apa este buna pentru consum, nu este nimic de a fi analizat;
   2. purificarea apei poate include procese biologice;
   3. purificarea apei poate include procesele de etichetare;
   4. apa este un solvent polar bun;
   
   
2. EDTA este utilizat:
   1. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   2. ca reactiv pentru determinarea duritatii apei;
   3. pentru indicarea punctului de echilibru īn reactie;
   4. ca masura de siguranta;
   5. pentru reīncarcarea rasinii la dedurizarea apei;
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   
4. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. duritate;
   2. culoare;
   3. alcalinitate totala;
   4. alcalinitate permanenta;
   5. puritate;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   2. NaOH + HCOO⁺ -> HCOONa + HO⁺
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + HCOO^- -> HCOONa + HO^-
   
   

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

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

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

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

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

1. The aluminum plate:
   1. was corroded in sodium hydroxide solution;
   2. was degreased in sodium hydroxide solution;
   3. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   4. the mass is measured before and after immersing it in NaOH;
   
   
2. In studied corrosion processes:
   1. when a gas is released its volume depends on the amount of metal corroded;
   2. always the metal changes its oxidation state;
   3. a gas is released only the corrosion of zinc;
   4. a gas is released at both corrosion of zinc and aluminum;
   
   
3. The zinc plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was corroded in sulfuric solution;
   3. the volume is measured before and after immersing it in H₂SO₄;
   4. the mass is measured before and after immersing it in H₂SO₄;
   
   
4. Corrosion of metals:
   1. is a beneficial process that shows the stability of metals;
   2. takes place merely from exposure to moisture in air;
   3. is the destruction of metals under the action of external factors;
   4. can be reduced by electroplating;
   
   
5. Which of the following reactions may be called as of corrosion:
   1. Fe₂O₃ + CO -> Fe + CO₂
   2. ZnO + CO -> Zn + CO₂
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. Ni(CO)₄ -> Ni + CO
   
   

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

1. Pentru placa de aluminiu:
   1. a fost corodata īn solutie de hidroxid de sodiu;
   2. a fost degresata īn solutie de hidroxid de sodiu;
   3. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   4. masa este masurata īnainte si dupa imersia īn NaOH;
   
   
2. Īn procesele de coroziune studiate:
   1. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   2. īntotdeauna metalul isi schimba starea de oxidare;
   3. un gaz este eliberat numai la corodarea zincului;
   4. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   
   
3. Pentru placa de zinc:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. a fost corodata īn solutie sulfuric;
   3. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   4. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   5. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
4. Coroziunea metalelor:
   1. este un proces benefic care arata stabilitatea metalelor;
   2. are loc pur si simplu prin expunerea la umiditate īn aer;
   3. este distrugerea metalelor sub actiunea factorilor externi;
   4. poate fi redusa prin galvanizare;
   5. poate furniza materii prime utile pentru analiza;
   
   
5. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. Fe₂O₃ + CO -> Fe + CO₂
   2. ZnO + CO -> Zn + CO₂
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. Ni(CO)₄ -> Ni + CO
   5. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   
   

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. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   3. H⁺ + Ni -> H₂ + Ni²⁺
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
2. The zinc plate:
   1. was involved in the gravimetric method of corrosion analysis
   2. the volume is measured before and after immersing it in H₂SO₄;
   3. was corroded in sulfuric solution;
   4. was degreased in sulfuric acid solution;
   
   
3. 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. the metal it changes its oxidation state becoming an anion;
   
   
4. 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. takes place merely from exposure to moisture in air;
   4. may provide useful raw materials for analysis;
   
   
5. The aluminum plate:
   1. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   2. the surface is measured before and after immersing it in NaOH;
   3. the volume is measured before and after immersing it in NaOH;
   4. was involved in the volumetric method of corrosion 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. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   3. H⁺ + Ni -> H₂ + Ni²⁺
   4. Al₂O₃ + NaOH -> NaAlO₂
   5. Ni(CO)₄ -> Ni + CO
   
   
2. Pentru placa de zinc:
   1. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   2. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   3. a fost corodata īn solutie sulfuric;
   4. a fost degresata īn solutie de acid sulfuric;
   
   
3. 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. metalul isi schimba starea de oxidare pentru a deveni un anion;
   5. īntotdeauna metalul isi schimba starea de oxidare;
   
   
4. Coroziunea metalelor:
   1. este distrugerea metalelor sub actiunea factorilor externi;
   2. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   3. are loc pur si simplu prin expunerea la umiditate īn aer;
   4. poate furniza materii prime utile pentru analiza;
   5. este protectia de durata impotriva agentilor chimici;
   
   
5. Pentru placa de aluminiu:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. suprafata se masoara īnainte si dupa imersia īn NaOH;
   3. volumul se masoara īnainte si dupa imersia īn NaOH;
   4. a fost implicata īn metoda volumetrica de analiza a coroziunii
   
   

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. H⁺ + Zn -> H₂ + Zn²⁺
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. ZnO + CO -> Zn + CO₂
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
2. The aluminum plate:
   1. the volume is measured before and after immersing it in NaOH;
   2. the surface is measured before and after immersing it in NaOH;
   3. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   4. was degreased in sodium hydroxide solution;
   
   
3. The zinc plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was involved in the gravimetric 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. when a gas is released its volume depends on the amount of metal corroded;
   2. the metal it changes its oxidation state becoming an anion;
   3. a gas is released at both corrosion of zinc and aluminum;
   4. the metal it changes its oxidation state becoming an cation;
   
   
5. Corrosion of metals:
   1. takes place merely from exposure to moisture in air;
   2. can be reduced by electroplating;
   3. is a beneficial process that shows the stability of metals;
   4. can be reduced by passivation;
   
   

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. H⁺ + Zn -> H₂ + Zn²⁺
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. ZnO + CO -> Zn + CO₂
   4. Al₂O₃ + NaOH -> NaAlO₂
   5. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   
2. Pentru placa de aluminiu:
   1. volumul se masoara īnainte si dupa imersia īn NaOH;
   2. suprafata se masoara īnainte si dupa imersia īn NaOH;
   3. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   4. a fost degresata īn solutie de hidroxid de sodiu;
   5. masa este masurata īnainte si dupa imersia īn NaOH;
   
   
3. Pentru placa de zinc:
   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 corodata īn solutie sulfuric;
   4. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   
   
4. Īn procesele de coroziune studiate:
   1. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   4. metalul isi schimba starea de oxidare pentru a deveni un cation;
   
   
5. Coroziunea metalelor:
   1. are loc pur si simplu prin expunerea la umiditate īn aer;
   2. poate fi redusa prin galvanizare;
   3. este un proces benefic care arata stabilitatea metalelor;
   4. poate fi redusa prin pasivare;
   5. este protectia de durata impotriva agentilor chimici;
   
   

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

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

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

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. It is expected to have a mass of nickel deposited:
   1. proportional with the nickel plating time;
   2. lower than the calculated theoretical one;
   3. inversely proportional with the intensity of the current used;
   4. inversely proportional with the nickel plating time;
   
   
2. Electrical conductivity of nickel salts solutions:
   1. depends on the intensity of the current used;
   2. is reduced by salts additions;
   3. is relatively small;
   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 before to start the experiment;
   3. affect only the quantity of the nickel deposition;
   4. is to be calculated after conducting 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 high densities of current oxygen anions (O^2-) have the tendency to discharge at the anode: O^2- - 2e^- -> O₂⁰
   
   
5. Theoretical mass of nickel deposited is calculated using:
   1. the conservation of the energy law;
   2. the conservation of the number of atoms for each element law;
   3. the electrolysis law;
   4. law of mass action;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Intensitatea curentului:
   1. se calculeaza dupa efectuarea experimentului;
   2. depinde de suprafata probei;
   3. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   4. afecteaza numai calitatea depunerii nichelului;
   5. nu afecteaza calitatea nici cantitatea nichelului depus;
   
   
2. La nichelare urmatoarele reactii au avut loc:
   1. la catod (-), īn contact cu piesa metalica, 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 anod (+), īn contact cu piesa de nichel, Ni⁰ - 2e^- -> Ni²⁺
   
   
3. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea conservarii energiei;
   2. legea electrolizei;
   3. legea solutilor;
   4. conservarea numarului de atomi pentru fiecare element;
   
   
4. Este de asteptat ca masa de nichel depus sa fie:
   1. mai mare decāt cea teoretica calculata;
   2. invers proportionala cu intensitatea curentului utilizat;
   3. mai mica decāt cea teoretica calculata;
   4. proportionala cu timpul de nichelare;
   5. mult mai mare decāt cea teoretica calculata;
   
   
5. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este relativ mica;
   2. depinde de potentialul sursei utilizate;
   3. depinde de intensitatea curentului utilizat;
   4. este redusa prin adaosuri de saruri;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea conservarii energiei;
   2. legea gazelor perfecte;
   3. conservarea numarului de atomi pentru fiecare element;
   4. legea electrolizei;
   5. legea actiunii maselor;
   
   
2. Este de asteptat ca masa de nichel depus sa fie:
   1. invers proportionala cu suprafata probei;
   2. mai mica decāt cea teoretica calculata;
   3. mai mare decāt cea teoretica calculata;
   4. proportionala cu timpul de nichelare;
   5. invers proportional cu timpul de nichelare;
   
   
3. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este relativ mica;
   2. depinde de intensitatea curentului utilizat;
   3. este īmbunatatita prin adaosuri de saruri;
   4. este relativ mare;
   5. depinde de potentialul sursei utilizate;
   
   
4. La nichelare urmatoarele reactii au avut loc:
   1. la catod (-), īn legatura cu piesa metalica, Ni⁰ - 2e^- -> Ni²⁺
   2. la anod (+), īn contact cu piesa de nichel, Ni⁰ - 2e^- -> Ni²⁺
   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 legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   
   
5. Intensitatea curentului:
   1. afecteaza numai calitatea depunerii nichelului;
   2. nu afecteaza calitatea nici cantitatea nichelului depus;
   3. se calculeaza dupa efectuarea experimentului;
   4. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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