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

1. At the ends of the tube following equilibrium reactions occurs:
   1. H⁺ + HO^- \=\ H₂O
   2. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   3. NH₃ + HCl \=\ NH₄Cl
   4. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
2. The chronometer is used in the experiment for:
   1. indication of the moment when we should pay attention to the experiment;
   2. measuring of the diffusion time;
   3. to keep us busy;
   4. extracting the information necessary to calculate the diffusion coefficients;
   
   
3. The position of the ring in the experiment is dependent on:
   1. the average energy or average speed of each involved species;
   2. the virtual speeds and not the real speeds of each involved species;
   3. the length of the tube and not of the width of the tube;
   4. the length of the tube and the width of the tube;
   
   
4. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all have same energy;
   2. all are moving in an arbitrary direction;
   3. are considered to be at the same temperature, but may have different speeds;
   4. all are moving in the same direction;
   
   
5. The fog observed during the experiment is due to:
   1. our experiment designed to trap the product of the reaction;
   2. unproper illumination in the laboratory and our breathing;
   3. presence of the chlorine;
   4. unproper illumination in the laboratory or our breathing;
   
   

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

1. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H⁺ + HO^- \=\ H₂O
   2. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   3. NH₃ + HCl \=\ NH₄Cl
   4. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
2. Cronometrul este utilizat īn experimentul pentru:
   1. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   2. masurarea timpului de difuzie;
   3. sa ne tina ocupati;
   4. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   
   
3. Pozitia inelului īn experimentul este dependenta de:
   1. energia medie sau viteza medie a fiecarei specii implicate;
   2. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   3. lungimea tubului si nu latimea tubului;
   4. lungimea tubului si latimea tubului;
   
   
4. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate au aceeasi energie;
   2. toate se īndreapta īntr-o directie arbitrara;
   3. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   4. toate se deplaseaza īn aceeasi directie;
   5. toate au aceeasi viteza;
   
   
5. Ceata observata īn timpul experimentului se datoreaza:
   1. experimentului nostru proiectat pentru a captura produsul de reactie;
   2. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   3. prezentei clorului;
   4. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   5. prezentei amoniacului;
   
   

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

1. We may say the followings:
   1. the kinetic energy of a molecule is affected by temperature and pressure;
   2. diffusion process appears only in gaseous state;
   3. diffusion process appears only in gaseous and liquid states;
   4. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   
   
2. The position of the ring in the experiment is dependent on:
   1. the speed of diffusion of each involved species;
   2. the propagation of the species as neutral molecules and not as ions;
   3. the propagation of the species as ions and not as neutral molecules;
   4. the concentrations of the solutions used;
   
   
3. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the diffusion coefficients;
   2. synchronization of the diffusion times;
   3. to keep us busy;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
4. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   2. H₂O \=\ H⁺ + HO^-
   3. HCl + H₂O \=\ Cl^- + H₃O⁺
   4. H⁺ + HO^- \=\ H₂O
   
   
5. The time to the formation of the ring in the experiment is dependent on:
   1. the speed of diffusion of each involved species;
   2. the propagation of the species as ions and not as neutral molecules;
   3. the mode energy or mode speed of each involved species;
   4. the length of the tube and not of the width of the tube;
   
   

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. energia cinetica a unei molecule este afectata de temperatura si presiune;
   2. proces de difuzie apare numai īn stare gazoasa;
   3. proces de difuzie apare numai īn stare gazoasa si lichida;
   4. energia cinetica a unei molecule este afectata de temperatura, presiune si dimensiunea moleculei;
   
   
2. Pozitia inelului īn experimentul este dependenta de:
   1. viteza de difuzie a fiecarei specii implicate;
   2. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   3. propagarea speciilor ca ionii si nu ca si molecule neutre;
   4. concentratiile solutiilor utilizate;
   
   
3. Cronometrul este utilizat īn experimentul pentru:
   1. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   2. sincronizarea timpilor de difuzie;
   3. sa ne tina ocupati;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   5. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   
   
4. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   2. H₂O \=\ H⁺ + HO^-
   3. HCl + H₂O \=\ Cl^- + H₃O⁺
   4. H⁺ + HO^- \=\ H₂O
   5. NH₃ + HCl \=\ NH₄Cl
   
   
5. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. viteza de difuzie a fiecarei specii implicate;
   2. propagarea speciilor ca ionii si nu ca si molecule neutre;
   3. viteza la moda sau energia la moda a fiecarei specii implicate;
   4. lungimea tubului si nu latimea tubului;
   5. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   
   

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

1. 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. synchronization of the diffusion times;
   4. measuring of the diffusion time;
   
   
2. The position of the ring in the experiment is dependent on:
   1. the average energy or average speed of each involved species;
   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 virtual speeds and not the real speeds of each involved species;
   
   
3. The time to the formation of the ring in the experiment is dependent on:
   1. the average energy or average speed of each involved species;
   2. the virtual speeds and not the real speeds of each involved species;
   3. the speed of diffusion of each involved species;
   4. the concentrations of the solutions used;
   
   
4. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + HCl \=\ NH₄Cl
   2. H₂O \=\ H⁺ + HO^-
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. H⁺ + HO^- \=\ H₂O
   
   
5. The fog observed during the experiment is due to:
   1. our experiment designed to trap the product of the reaction;
   2. formation of ammonium chloride;
   3. unproper illumination in the laboratory or our breathing;
   4. unproper illumination in the laboratory and our breathing;
   
   

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

1. 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. sincronizarea timpilor de difuzie;
   4. masurarea timpului de difuzie;
   5. sa ne tina ocupati;
   
   
2. Pozitia inelului īn experimentul este dependenta de:
   1. energia medie sau viteza medie a fiecarei specii implicate;
   2. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   3. viteza la moda sau energia la moda a fiecarei specii implicate;
   4. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   
   
3. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. energia medie sau viteza medie a fiecarei specii implicate;
   2. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   3. viteza de difuzie a fiecarei specii implicate;
   4. concentratiile solutiilor utilizate;
   
   
4. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₃ + HCl \=\ NH₄Cl
   2. H₂O \=\ H⁺ + HO^-
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. H⁺ + HO^- \=\ H₂O
   
   
5. Ceata observata īn timpul experimentului se datoreaza:
   1. experimentului nostru proiectat pentru a captura produsul de reactie;
   2. formarea clorurii de amoniu;
   3. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   4. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   5. prezentei clorului;
   
   

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. extracting the information necessary to calculate the diffusion coefficients;
   3. synchronization of the diffusion times;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
2. The position of the ring in the experiment is dependent on:
   1. the speed of diffusion of each involved species;
   2. the mode energy or mode speed of each involved species;
   3. the length of the tube and not of the width of the tube;
   4. the width of the tube and not of the length of the tube;
   
   
3. The fog observed during the experiment is due to:
   1. formation of ammonium chloride;
   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. the molecules have speeds only in gaseous and liquid states;
   2. diffusion process appears only in gaseous state;
   3. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   4. the molecules have speeds in all gaseous, liquid and solid states;
   
   
5. At the ends of the tube following equilibrium reactions occurs:
   1. H₂O \=\ H⁺ + HO^-
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. NH₃ + HCl \=\ NH₄Cl
   4. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   
   

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. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   3. sincronizarea timpilor de difuzie;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   5. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   
   
2. Pozitia inelului īn experimentul este dependenta de:
   1. viteza de difuzie a fiecarei specii implicate;
   2. viteza la moda sau energia la moda a fiecarei specii implicate;
   3. lungimea tubului si nu latimea tubului;
   4. latimea tubului si nu lungimea tubului;
   5. lungimea tubului si latimea tubului;
   
   
3. Ceata observata īn timpul experimentului se datoreaza:
   1. formarea clorurii de amoniu;
   2. prezentei clorului;
   3. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   4. experimentului nostru proiectat pentru a captura produsul de reactie;
   5. prezentei amoniacului;
   
   
4. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au viteze numai īn stare gazoasa si lichida;
   2. proces de difuzie apare numai īn stare gazoasa;
   3. energia cinetica a unei molecule este afectata de temperatura, presiune si dimensiunea moleculei;
   4. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   
   
5. La capetele tubului urmatoarele reactii de echilibru apar:
   1. H₂O \=\ H⁺ + HO^-
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. NH₃ + HCl \=\ NH₄Cl
   4. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   
   

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

1. The fog observed during the experiment is due to:
   1. our experiment designed to trap the product of the reaction;
   2. formation of ammonium chloride;
   3. presence of the ammonia;
   4. presence of the chlorine;
   
   
2. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the diffusion coefficients;
   2. synchronization of the diffusion times;
   3. measuring of the diffusion time;
   4. to keep us busy;
   
   
3. We may say the followings:
   1. the molecules have energy only in gaseous state;
   2. diffusion process appears only in gaseous and liquid states;
   3. the molecules have speeds in all gaseous, liquid and solid states;
   4. diffusion process appears in all gaseous, liquid and solid states;
   
   
4. At the ends of the tube following equilibrium reactions occurs:
   1. H⁺ + HO^- \=\ H₂O
   2. HCl + H₂O \=\ Cl^- + H₃O⁺
   3. H₂O \=\ H⁺ + HO^-
   4. NH₃ + HCl \=\ NH₄Cl
   
   
5. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all have same energy;
   2. are considered to be at the same temperature, but may have different speeds;
   3. all have same speed;
   4. all are moving in the same direction;
   
   

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

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

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

1. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   3. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   4. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   
   
2. 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 is much higher than in liquid state;
   
   
3. The values taken from the experiment conducted in the laboratory indicated that:
   1. air were released as result of the decomposition;
   2. the ideal model of a gas approximated the best the behavior of the released gas;
   3. the ideal model of a gas approximated the worst the behavior of the released gas;
   4. we possess enough information to decide what gas was released from the reaction;
   
   
4. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O₂ -> H₂O + O₂;
   2. opening a bubble water bottle;
   3. H₂O + O₂ -> H₂O₂;
   4. distillation of the liquid air;
   
   
5. A state equation for a real gas is:
   1. a relation which takes into account certain deviations from the ideal model;
   2. a relation which is always true, independent of the values of the state parameters;
   3. a relation derived to approximate the relation between state parameters;
   4. a relation which may involve some constants dependent of gas composition;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   
   
2. 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 este mult mai mare decāt īn stare lichida;
   
   
3. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. aer a fost eliberat ca urmare a descompunerii;
   2. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   3. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   4. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   5. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O₂ -> H₂O + O₂;
   2. deschiderea unei sticle de apa cu bule;
   3. H₂O + O₂ -> H₂O₂;
   4. distilarea aerului lichid;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   2. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   3. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   4. o relatie care poate implica unele constante dependente de compozitia gazului;
   5. o relatie īntre un anumit numar de parametri de stare;
   
   

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

1. For gaseous state:
   1. the pressure is exactly the same as in liquid state;
   2. the pressure is unchanged when a chemical reaction occurs;
   3. the pressure is much lower than in liquid state;
   4. we need to take supplementary precautions in the laboratory;
   
   
2. The values taken from the experiment conducted in the laboratory indicated that:
   1. air were released as result of the decomposition;
   2. the ideal model of a gas approximated the worst the behavior of the released gas;
   3. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   4. ozone were released as result of the decomposition;
   
   
3. In the laboratory were studied:
   1. the producing of some gas as result of a lost of the mass of a solid;
   2. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   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. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   2. distillation of the liquid air;
   3. H₂O₂ -> H₂O + O₂;
   4. KNO₂ + O₂ -> KNO₃;
   
   
5. A state equation for a real gas is:
   1. a relation derived to approximate the relation between state parameters;
   2. a relation which is always true, independent of the values of the state parameters;
   3. a relation between an unlimited number of state parameters;
   4. usable in the laboratory, but is not to be used somewhere else;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pentru stare gazoasa:
   1. presiunea este exact la fel ca si īn stare lichida;
   2. presiunea este neschimbata cānd apare o reactie chimica;
   3. presiunea este mult mai mica decāt īn stare lichida;
   4. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   5. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   
   
2. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. aer a fost eliberat ca urmare a descompunerii;
   2. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   3. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   4. ozonul au fost eliberat ca urmare a descompunerii;
   5. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
3. Īn laborator s-au studiat:
   1. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   2. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   3. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   4. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   5. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   2. distilarea aerului lichid;
   3. H₂O₂ -> H₂O + O₂;
   4. KNO₂ + O₂ -> KNO₃;
   
   
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 este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   3. o relatie īntre un numar nelimitat de parametri de stare;
   4. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   5. o relatie īntre un anumit numar de parametri de stare;
   
   

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

1. A state equation for a real gas is:
   1. a relation obtained after conducting of the experiment;
   2. usable in the laboratory, but is not to be used somewhere else;
   3. a relation between an unlimited number of state parameters;
   4. a relation derived to approximate the relation between state parameters;
   
   
2. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   2. distillation of the liquid air;
   3. KNO₃ -> KNO₂ + O₂;
   4. H₂O₂ -> H₂O + O₂;
   
   
3. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   2. the lost of the mass of a solid as result of producing of some gas;
   3. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   4. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   
   
4. For gaseous state:
   1. the pressure is unchanged when a chemical reaction occurs;
   2. the pressure is much higher than in liquid state;
   3. it exists an equation for all, p · V = n · R · T;
   4. the pressure is approximately the same as in liquid state;
   
   
5. The values taken from the experiment conducted in the laboratory indicated that:
   1. ozone were released as result of the decomposition;
   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;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. O ecuatie de stare pentru un gaz real este:
   1. o relatie obtinut dupa efectuarea experimentului;
   2. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   3. o relatie īntre un numar nelimitat de parametri de stare;
   4. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   
   
2. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   2. distilarea aerului lichid;
   3. KNO₃ -> KNO₂ + O₂;
   4. H₂O₂ -> H₂O + O₂;
   
   
3. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   2. pierdut din masa de solid ca urmare a producerii unor gaze;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   
   
4. Pentru stare gazoasa:
   1. presiunea este neschimbata cānd apare o reactie chimica;
   2. presiunea este mult mai mare decāt īn stare lichida;
   3. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   4. presiunea este aproximativ aceeasi ca si īn stare lichida;
   5. presiunea se pot modifica atunci cānd apare o reactie chimica;
   
   
5. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. ozonul au fost eliberat ca urmare a descompunerii;
   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;
   
   

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

1. A state equation for a real gas is:
   1. a relation which may involve some constants dependent of gas composition;
   2. a relation which takes into account certain deviations from the ideal model;
   3. a relation between an certain number of state parameters;
   4. a relation between an unlimited number of state parameters;
   
   
2. For gaseous state:
   1. we need to take supplementary precautions in the laboratory;
   2. the pressure depends on the model which are used to approximate it;
   3. the pressure is approximately the same as in liquid state;
   4. it exists an equation for all, p · V = n · R · T;
   
   
3. The values taken from the experiment conducted in the laboratory indicated that:
   1. oxigen were released as result of the decomposition;
   2. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   3. ozone were released as result of the decomposition;
   4. the ideal model of a gas approximated the worst the behavior of the released gas;
   
   
4. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. Ag + O₂ -> Ag₂O;
   2. Ag₂O -> Ag + O₂;
   3. KNO₃ -> KNO₂ + O₂;
   4. KClO₃ -> KCl + O₂;
   
   
5. In the laboratory were studied:
   1. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   2. increasing of the pressure of a gas when was heated;
   3. increasing of the temperature of a solid mass when was heated;
   4. the lost of the mass of a solid as result of producing of some gas;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. O ecuatie de stare pentru un gaz real este:
   1. o relatie care poate implica unele constante dependente de compozitia gazului;
   2. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   3. o relatie īntre un anumit numar de parametri de stare;
   4. o relatie īntre un numar nelimitat de parametri de stare;
   5. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   
   
2. Pentru stare gazoasa:
   1. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   2. presiunea depinde de modelul care este utilizat pentru o aproxima;
   3. presiunea este aproximativ aceeasi ca si īn stare lichida;
   4. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   
   
3. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. oxigenul au fost eliberat ca urmare a descompunerii;
   2. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. ozonul au fost eliberat ca urmare a descompunerii;
   4. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   
   
4. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. Ag + O₂ -> Ag₂O;
   2. Ag₂O -> Ag + O₂;
   3. KNO₃ -> KNO₂ + O₂;
   4. KClO₃ -> KCl + O₂;
   5. KNO₂ + O₂ -> KNO₃;
   
   
5. Īn laborator s-au studiat:
   1. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   2. cresterea presiunii unui gaz cānd s-a īncalzit;
   3. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   4. pierdut din masa de solid ca urmare a producerii unor gaze;
   5. 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. A state equation for a real gas is:
   1. a relation between an certain number of state parameters;
   2. usable in the laboratory, but is not to be used somewhere else;
   3. a relation which may involve some constants dependent of gas composition;
   4. a relation obtained after conducting of the experiment;
   
   
2. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O + O₂ -> H₂O₂;
   2. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   3. H₂O₂ -> H₂O + O₂;
   4. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   
   
3. The values taken from the experiment conducted in the laboratory indicated that:
   1. the ideal model of a gas approximated the best the behavior of the released gas;
   2. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   3. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   4. the ideal model of a gas approximated the worst the behavior of the released gas;
   
   
4. For gaseous state:
   1. the pressure is approximately the same as in liquid state;
   2. we need to take supplementary precautions in the laboratory;
   3. the pressure is much higher than in liquid state;
   4. the pressure is exactly the same as in liquid state;
   
   
5. In the laboratory were studied:
   1. increasing of the temperature of a solid mass when was heated;
   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 oxygen is released;
   4. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. O ecuatie de stare pentru un gaz real este:
   1. o relatie īntre un anumit numar de parametri de stare;
   2. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   3. o relatie care poate implica unele constante dependente de compozitia gazului;
   4. o relatie obtinut dupa efectuarea experimentului;
   
   
2. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O + O₂ -> H₂O₂;
   2. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   3. H₂O₂ -> H₂O + O₂;
   4. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   5. KNO₂ + O₂ -> KNO₃;
   
   
3. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   2. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   4. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   
   
4. Pentru stare gazoasa:
   1. presiunea este aproximativ aceeasi ca si īn stare lichida;
   2. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   3. presiunea este mult mai mare decāt īn stare lichida;
   4. presiunea este exact la fel ca si īn stare lichida;
   
   
5. Īn laborator s-au studiat:
   1. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   2. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   5. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. This method of analysis of metals and alloys is:
   1. not useful for both metals and alloys;
   2. too ancient to be used today in the laboratory;
   3. useful for alloys, not so useful for metals;
   4. a nondestructive method of analysis;
   
   
2. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as cations;
   2. water dissociation is inhibited;
   3. surface of the sample is fastly covered by a protecting shield of electrons;
   4. elements from the solution are passed into sample as metals;
   
   
3. The electric charges after passing the metals into solution may be:
   1. dependent on the intensity of the current applied to the electrograf and composition of the metal alloy;
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   4. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   
   
4. The paper requires before analysis of the sample:
   1. to measure its surface;
   2. to be dry;
   3. to be burned;
   4. to be moistened with an electrolyte;
   
   
5. When lead is identified:
   1. a heat release is observed;
   2. a violet complex appears;
   3. the reactions used clearly indicates its presence;
   4. a blue complex appears;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Aceasta metoda de analiza de metale si aliaje este:
   1. nu este utila nici pentru metale nici pentru aliaje;
   2. prea veche pentru a fi utilizata īn prezent īn laborator;
   3. utila pentru aliaje, nu atāt de utila pentru metale;
   4. o metoda nedistructiva de analiza;
   
   
2. Cānd circuitul electric este īnchis:
   1. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   2. disocierea apei este inhibata;
   3. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   4. elemente din solutie sunt trecute īn proba ca metale;
   5. curent electric trece prin proba si hārtie;
   
   
3. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   4. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   
   
4. Hartia necesita ca īnainte de analiza probei:
   1. sa i se masoare suprafata;
   2. sa fie uscata;
   3. sa fie arsa;
   4. sa fie umezita cu un electrolit;
   5. sa fie testata;
   
   
5. Cānd plumbul este identificat:
   1. se observa o eliberare de caldura;
   2. apare un complex violet;
   3. reactiile utilizate īn mod clar ii indica prezenta;
   4. apare un complex albastru;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The paper requires before analysis of the sample:
   1. to be acidified;
   2. to be burned;
   3. to be cut in small pieces;
   4. to be dry;
   
   
2. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as cations;
   2. electric current avoids the sample and the paper;
   3. elements from the metals are passed into solution as anions;
   4. water dissociation is inhibited;
   
   
3. When lead is identified:
   1. a blue complex appears;
   2. a red-brown complex appears;
   3. a yellow complex appears;
   4. a violet complex appears;
   
   
4. When aluminum is identified:
   1. there are many identification reactions possible;
   2. the presence of other ions may produce a false negative outcome;
   3. is identified as Al²⁺ cation;
   4. the presence of other ions may produce a true positive outcome;
   
   
5. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Hartia necesita ca īnainte de analiza probei:
   1. sa fie acidulata;
   2. sa fie arsa;
   3. sa fie taiata īn bucati mici;
   4. sa fie uscata;
   
   
2. Cānd circuitul electric este īnchis:
   1. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   2. curent electric evita proba si hārtia;
   3. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   4. disocierea apei este inhibata;
   5. elemente din solutie sunt trecute īn proba ca metale;
   
   
3. Cānd plumbul este identificat:
   1. apare un complex albastru;
   2. apare un complex rosu-brun;
   3. apare un complex galben;
   4. apare un complex violet;
   
   
4. Cānd aluminiu este identificat:
   1. exista multe reactii posibile de identificare;
   2. prezenta altor ioni poate produce un rezultat fals negativ;
   3. este identificat ca cationul Al²⁺;
   4. prezenta altor ioni poate produce un rezultat adevarat pozitiv;
   5. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   
   
5. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   3. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. This method of analysis of metals and alloys is:
   1. not useful for both metals and alloys;
   2. useful for alloys, not so useful for metals;
   3. useful for both metals and alloys;
   4. a destructive method of analysis;
   
   
2. When lead is identified:
   1. a blue complex appears;
   2. a violet complex appears;
   3. dangerous substances are used;
   4. a red-brown complex appears;
   
   
3. The paper requires before analysis of the sample:
   1. to be weighted;
   2. to be tested;
   3. to be cut in small pieces;
   4. to be dry;
   
   
4. When aluminum is identified:
   1. is identified as Al³⁺ cation;
   2. the presence of other ions may produce a true positive outcome;
   3. is identified as Al¹⁺ cation;
   4. the presence of other ions may produce a true negative outcome;
   
   
5. Why moisten the paper with solution of sodium nitrate?
   1. for stopping after a while the chemical reaction that takes place;
   2. to accomodate ourselves to use chemicals;
   3. for the paper to work as isolator;
   4. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Aceasta metoda de analiza de metale si aliaje este:
   1. nu este utila nici pentru metale nici pentru aliaje;
   2. utila pentru aliaje, nu atāt de utila pentru metale;
   3. utila atāt pentru metale si aliaje;
   4. o metoda distructiva de analiza;
   5. o metoda gravimetrica de analiza;
   
   
2. Cānd plumbul este identificat:
   1. apare un complex albastru;
   2. apare un complex violet;
   3. sunt utilizate substante periculoase;
   4. apare un complex rosu-brun;
   
   
3. Hartia necesita ca īnainte de analiza probei:
   1. sa fie cantarita;
   2. sa fie testata;
   3. sa fie taiata īn bucati mici;
   4. sa fie uscata;
   5. sa fie acidulata;
   
   
4. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al³⁺;
   2. prezenta altor ioni poate produce un rezultat adevarat pozitiv;
   3. este identificat ca cationul Al¹⁺;
   4. prezenta altor ioni poate produce un rezultat adevarat negativ;
   5. este identificat ca cationul Al²⁺;
   
   
5. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru oprirea dupa un timp reactiei chimice care are loc;
   2. sa ne acomodam in a utiliza substante chimice;
   3. pentru ca hartia sa actioneze ca izolator;
   4. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as cations;
   2. water dissociation is inhibited;
   3. electric current passes the sample and the paper;
   4. surface of the sample is fastly covered by a protecting shield of electrons;
   
   
2. When aluminum is identified:
   1. there are many identification reactions possible;
   2. the presence of other ions may produce a true negative outcome;
   3. the presence of other ions may produce a false negative outcome;
   4. is identified as Al³⁺ cation;
   
   
3. Why moisten the paper with solution of sodium nitrate?
   1. to be cut easily with scissors;
   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. for stopping after a while the chemical reaction that takes place;
   
   
4. The electric charges after passing the metals into solution may be:
   1. dependent on the intensity of the current applied to the electrograf and composition of the metal alloy;
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
5. The paper requires before analysis of the sample:
   1. to be burned;
   2. to be tested;
   3. to be acidified;
   4. to be cut in small pieces;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd circuitul electric este īnchis:
   1. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   2. disocierea apei este inhibata;
   3. curent electric trece prin proba si hārtie;
   4. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   5. elemente din solutie sunt trecute īn proba ca metale;
   
   
2. Cānd aluminiu este identificat:
   1. exista multe reactii posibile de identificare;
   2. prezenta altor ioni poate produce un rezultat adevarat negativ;
   3. prezenta altor ioni poate produce un rezultat fals negativ;
   4. este identificat ca cationul Al³⁺;
   
   
3. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. sa fie taiat cu usurinta cu foarfeca;
   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. pentru oprirea dupa un timp reactiei chimice care are loc;
   
   
4. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
5. Hartia necesita ca īnainte de analiza probei:
   1. sa fie arsa;
   2. sa fie testata;
   3. sa fie acidulata;
   4. sa fie taiata īn bucati mici;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When the electrical circuit is closed:
   1. surface of the sample is fastly covered by a protecting shield of electrons;
   2. electric current avoids the sample and the paper;
   3. electric current passes the sample and the paper;
   4. water dissociation is inhibited;
   
   
2. The paper requires before analysis of the sample:
   1. to be tested;
   2. to be cut in small pieces;
   3. to be moistened with an electrolyte;
   4. to measure its surface;
   
   
3. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
4. When lead is identified:
   1. interference of other ions may affect the outcome;
   2. a blue complex appears;
   3. precautions should be made for toxic wastes disposal;
   4. dangerous substances are used;
   
   
5. This method of analysis of metals and alloys is:
   1. a nondestructive method of analysis;
   2. not useful for both metals and alloys;
   3. a destructive method of analysis;
   4. a quantitative method of analysis;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd circuitul electric este īnchis:
   1. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   2. curent electric evita proba si hārtia;
   3. curent electric trece prin proba si hārtie;
   4. disocierea apei este inhibata;
   5. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   
   
2. Hartia necesita ca īnainte de analiza probei:
   1. sa fie testata;
   2. sa fie taiata īn bucati mici;
   3. sa fie umezita cu un electrolit;
   4. sa i se masoare suprafata;
   5. sa fie cantarita;
   
   
3. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   5. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   
   
4. Cānd plumbul este identificat:
   1. interferenta altor ioni poate afecta rezultatul;
   2. apare un complex albastru;
   3. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   4. sunt utilizate substante periculoase;
   
   
5. Aceasta metoda de analiza de metale si aliaje este:
   1. o metoda nedistructiva de analiza;
   2. nu este utila nici pentru metale nici pentru aliaje;
   3. o metoda distructiva de analiza;
   4. o metoda cantitativa de analiza;
   5. prea veche pentru a fi utilizata īn prezent īn laborator;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The indicator should be added:
   1. only in special cases, when the burette is graded from its bottom to its top;
   2. in small quantities, to avoid the errors in observations and in calculations;
   3. only at the suggestion of the supervisor;
   4. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   
   
2. A redox process:
   1. is always fast and safe;
   2. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. involves changing of the aggregation states of some participants to the reaction;
   4. involves a transfer of electrons from one atom or group of atoms to another;
   
   
3. The equivalence point is:
   1. the point in which a reactive should be added in the reaction flask;
   2. used to balance the equation;
   3. the point in which a reactive should be added in the burette;
   4. something rarely encountered in chemistry;
   
   
4. When a chemical reaction is balanced, following should be considered:
   1. the liquid in the burette should be at the same level before and after conducting the experiment;
   2. all glassware should be clean before, after and during the experiment;
   3. the principle of the conservation of the volume;
   4. the principle of the conservation of the number of atoms for each element;
   
   
5. The following chemical reactions were used in the experiments:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. H₂O + CO₂ -> H₂CO₃
   3. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Trebuie adaugat indicatorul:
   1. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   2. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   3. numai la sugestia supraveghetorului;
   4. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   5. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   
   
2. Un proces redox:
   1. este īntotdeauna rapid si sigur;
   2. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   4. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   
   
3. Punctul de echivalenta este:
   1. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   2. folosit pentru a echilibra ecuatia;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   4. ceva rar īntālnit īn chimie;
   
   
4. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   2. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   3. principiul conservarii volumului;
   4. principiul conservarii numarul de atomi pentru fiecare element;
   5. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   
   
5. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. H₂O + CO₂ -> H₂CO₃
   3. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   5. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. A redox process:
   1. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. involves changing of the aggregation states of some participants to the reaction;
   3. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. occurs only when we mix wrong substances in the laboratory;
   
   
2. Reactions between acids and bases:
   1. have as effect the change of the color of a solution;
   2. are always fast, taking place almost instantaneously;
   3. are all exothermic, being therefore dangerous outside of the laboratory;
   4. are rarely useful, and even rarely used;
   
   
3. The following chemical reactions were used in the experiments:
   1. H₂O + CO₂ -> H₂CO₃
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   
   
4. In the calculations:
   1. are necessary to take some information from reagent bottles;
   2. are necessary to draw the tables in our notebooks after completing of the experiment;
   3. are necessary to use some formulas expressing in different ways the concentration;
   4. are necessary to establish the coefficients of the chemical reaction;
   
   
5. When a chemical reaction is balanced, following should be considered:
   1. all glassware should be clean before, after and during the experiment;
   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. the principle of the conservation of the energy;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Un proces redox:
   1. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   3. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. apare numai atunci cānd se amesteca substante gresit īn laborator;
   
   
2. Reactiile īntre acizi si baze:
   1. au ca efect schimbarea culorii unei solutii;
   2. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   3. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   4. sunt rareori utile, si chiar mai rar utilizate;
   5. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   
   
3. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. H₂O + CO₂ -> H₂CO₃
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   
   
4. In calcule:
   1. este necesar a se lua unele informatii de pe sticlele de reactivi;
   2. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   3. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   4. este necesara stabilirea coeficientilor reactiei chimice;
   
   
5. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   2. principiul conservarii volumului;
   3. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   4. principiul conservarii energiei;
   
   

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 energy;
   2. the liquid in the burette should be at the same level before and after conducting the experiment;
   3. all glassware should be clean before and after conducting the experiment;
   4. the principle of the conservation of the volume;
   
   
2. Titration as a laboratory operation involves:
   1. an mixing of two ore more solutions;
   2. a standard or referential reactive;
   3. a pH indicator that changes color depending on the pH of the solution;
   4. a natrium hydroxide solution;
   
   
3. The following chemical reactions were used in the experiments:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. H₂O + CO₂ -> H₂CO₃
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   
   
4. The density of the solutions depends on:
   1. time elapsed since were prepared;
   2. quantity;
   3. pressure;
   4. temperature;
   
   
5. A redox process:
   1. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   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. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + 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 energiei;
   2. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   3. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   4. principiul conservarii volumului;
   5. principiul conservarii numarul de atomi pentru fiecare element;
   
   
2. Titrarea ca o operatiune de laborator implica:
   1. amestecul a doua sau mai multe solutii;
   2. un standard sau reactiv de referinta;
   3. un indicator de pH care īsi schimba culoarea īn functie de pH-ul solutiei;
   4. o solutie de hidroxid de sodiu;
   
   
3. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   2. H₂O + CO₂ -> H₂CO₃
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   
   
4. Densitatea solutiilor depinde de:
   1. timpul scurs de cand au fost pregatite;
   2. cantitate;
   3. presiune;
   4. temperatura;
   
   
5. Un proces redox:
   1. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   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. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. 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. are always fast, taking place almost instantaneously;
   4. always have as a consequence the formation of a quantity of water;
   
   
2. The density of the solutions depends on:
   1. time elapsed since were prepared;
   2. provider;
   3. quantity;
   4. temperature;
   
   
3. The equivalence point is:
   1. used to balance the equation;
   2. the point in which a reactive should be added in the burette;
   3. the point in which a reactive should be added in the reaction flask;
   4. the point in which a reactive is fully consumed in the reaction;
   
   
4. Titration as a laboratory operation involves:
   1. an mixing of two ore more solutions;
   2. a pH indicator that changes color depending on the pH of the solution;
   3. a mass measurement;
   4. a pH-metter;
   
   
5. A redox process:
   1. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   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;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Reactiile īntre acizi si baze:
   1. sunt rareori utile, si chiar mai rar utilizate;
   2. au ca efect schimbarea culorii unei solutii;
   3. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   4. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   
   
2. Densitatea solutiilor depinde de:
   1. timpul scurs de cand au fost pregatite;
   2. furnizor;
   3. cantitate;
   4. temperatura;
   
   
3. Punctul de echivalenta este:
   1. folosit pentru a echilibra ecuatia;
   2. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   4. punctul īn care un reactiv este consumat complet īn reactie;
   
   
4. Titrarea ca o operatiune de laborator implica:
   1. amestecul a doua sau mai multe solutii;
   2. un indicator de pH care īsi schimba culoarea īn functie de pH-ul solutiei;
   3. masurarea masei;
   4. un pH-metru;
   5. o solutie de sare;
   
   
5. Un proces redox:
   1. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   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;
   5. este īntotdeauna rapid si sigur;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. In the calculations:
   1. are necessary to use some formulas expressing in different ways the concentration;
   2. are necessary to draw the tables in our notebooks after completing of the experiment;
   3. are necessary to use our phones;
   4. are necessary to establish the coefficients of the chemical reaction;
   
   
2. The equivalence point is:
   1. indicated when a color change is observed into the solution;
   2. the point in which a reactive should be added in the reaction flask;
   3. the point in which a reactive is fully consumed in the reaction;
   4. used to balance the equation;
   
   
3. The density of the solutions depends on:
   1. temperature;
   2. pressure;
   3. time elapsed since were prepared;
   4. quantity;
   
   
4. 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 principle of the conservation of the volume;
   
   
5. Titration as a laboratory operation involves:
   1. a standard or referential reactive;
   2. a natrium hydroxide solution;
   3. a volume measurement;
   4. an mixing of two ore more solutions;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. In calcule:
   1. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   2. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   3. este necesar sa utilizam telefoanele;
   4. este necesara stabilirea coeficientilor reactiei chimice;
   5. este necesar sa discutam cu colegii;
   
   
2. Punctul de echivalenta este:
   1. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   2. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   3. punctul īn care un reactiv este consumat complet īn reactie;
   4. folosit pentru a echilibra ecuatia;
   5. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   
   
3. Densitatea solutiilor depinde de:
   1. temperatura;
   2. presiune;
   3. timpul scurs de cand au fost pregatite;
   4. cantitate;
   5. furnizor;
   
   
4. 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. principiul conservarii volumului;
   
   
5. Titrarea ca o operatiune de laborator implica:
   1. un standard sau reactiv de referinta;
   2. o solutie de hidroxid de sodiu;
   3. masurarea volumului;
   4. amestecul a doua sau mai multe solutii;
   5. o solutie de sare;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. color;
   2. total acidity;
   3. mineral acidity;
   4. hardness;
   
   
2. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   2. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   3. HCl + HO^- -> H₂O + Cl^-
   4. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   
   
3. In the laboratory were analyzed:
   1. the hardness of the water;
   2. the solubility of the water;
   3. the temperature of the water;
   4. the mass of the water;
   
   
4. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   2. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   3. HCl + HO^- -> H₂O + Cl^-
   4. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   
   
5. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   2. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   3. NaOH + HCOO^- -> HCOONa + HO^-
   4. NaOH + CH₃COO^- -> CH₃COONa + HO^-
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. culoare;
   2. aciditate totala;
   3. aciditate minerala;
   4. duritate;
   5. alcalinitate totala;
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   2. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   3. HCl + HO^- -> H₂O+Cl^-
   4. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   
   
3. Īn laborator au fost analizate:
   1. duritatea apei;
   2. solubilitatea apei;
   3. temperatura apei;
   4. masa apei;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   2. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   3. HCl + HO^- -> H₂O + Cl^-
   4. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   5. HCl + HO⁺ -> H₂O + Cl⁺
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   2. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   3. NaOH + HCOO^- -> HCOONa + HO^-
   4. NaOH + CH₃COO^- -> CH₃COONa+HO^-
   5. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   3. HCl + CO₃^2- -> HCO₃^- + Cl^-
   4. HCl + HO^- -> H₂O + Cl^-
   
   
2. EDTA is used:
   1. for complexing of Na¹⁺ and K¹⁺ ions;
   2. as reagent for determining the hardness of the water;
   3. for safety precautions purposes;
   4. for complexing of Ca²⁺ and Mg²⁺ ions;
   
   
3. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   2. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   3. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   4. NaOH + Cl^- -> NaCl + HO^-
   
   
4. In the laboratory the water were:
   1. softened using the resin column;
   2. alkalinized for drinking purposes;
   3. acidified for drinking purposes;
   4. biologically purified using the resin column;
   
   
5. We may say the followings:
   1. purification of the water may include physical processes;
   2. purification of the water may include chemical processes;
   3. purification of the water may include labeling processes;
   4. water is a good polar solvent;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   3. HCl + CO₃^2- -> HCO₃^- + Cl^-
   4. HCl + HO^- -> H₂O+Cl^-
   
   
2. EDTA este utilizat:
   1. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   2. ca reactiv pentru determinarea duritatii apei;
   3. ca masura de siguranta;
   4. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   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 + NO₃⁺ -> NaNO₃ + HO⁺
   2. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   3. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   4. NaOH + Cl^- -> NaCl + HO^-
   5. NaOH + NO₃^- -> NaNO₃ + HO^-
   
   
4. In laborator apa au fost:
   1. dedurizata folosind coloana de rasina;
   2. alcalinizeaza pentru baut;
   3. acidulata pentru baut;
   4. purificata biologic utilizānd coloana de rasina;
   
   
5. Putem spune urmatoarele:
   1. purificarea apei poate include procedee fizice;
   2. purificarea apei poate include procese chimice;
   3. purificarea apei poate include procesele de etichetare;
   4. apa este un solvent polar bun;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   2. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   3. HCl + CO₃^2- -> HCO₃^- + Cl^-
   4. HCl + HO^- -> H₂O + Cl^-
   
   
2. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. HCl + HO^- -> H₂O + Cl^-
   3. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   4. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   
   
3. In the laboratory were analyzed:
   1. the solubility of the water;
   2. the acidity of the water;
   3. the hardness of the water;
   4. the temperature of the water;
   
   
4. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   2. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   3. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   4. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   
   
5. In the laboratory the water were:
   1. biologically purified using the resin column;
   2. alkalinized for drinking purposes;
   3. softened using the resin column;
   4. complexed by using EDTA titrimetric method;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   2. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   3. HCl + CO₃^2- -> HCO₃^- + Cl^-
   4. HCl + HO^- -> H₂O+Cl^-
   5. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. HCl + HO^- -> H₂O + Cl^-
   3. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   4. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   
   
3. Īn laborator au fost analizate:
   1. solubilitatea apei;
   2. aciditatea apei;
   3. duritatea apei;
   4. temperatura apei;
   5. masa apei;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   2. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   3. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   4. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   
   
5. In laborator apa au fost:
   1. purificata biologic utilizānd coloana de rasina;
   2. alcalinizeaza pentru baut;
   3. dedurizata folosind coloana de rasina;
   4. complexata prin metoda titrimetrica EDTA;
   5. acidulata pentru baut;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. hardness;
   2. mineral acidity;
   3. color;
   4. total alkalinity;
   
   
2. We may say the followings:
   1. when water contains dissolved minerals and gases is bad for drinking;
   2. natural water may contain organic matter and living organisms;
   3. purification of the water may include chemical processes;
   4. purification of the water may include physical processes;
   
   
3. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   2. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   3. HCl + CO₃^2- -> HCO₃^- + Cl^-
   4. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   
   
4. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   2. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   
   
5. In the laboratory were analyzed:
   1. the softness of the water;
   2. the acidity of the water;
   3. the concentration of the water;
   4. the solubility of the water;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. duritate;
   2. aciditate minerala;
   3. culoare;
   4. alcalinitate totala;
   5. aciditate totala;
   
   
2. Putem spune urmatoarele:
   1. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   2. apa naturala poate contine materie organica si organisme vii;
   3. purificarea apei poate include procese chimice;
   4. purificarea apei poate include procedee fizice;
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   2. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   3. HCl + CO₃^2- -> HCO₃^- + Cl^-
   4. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   2. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   5. NaOH + NO₃^- -> NaNO₃ + HO^-
   
   
5. Īn laborator au fost analizate:
   1. moliciunea apei;
   2. aciditatea apei;
   3. concentratia apei;
   4. solubilitatea apei;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. We may say the followings:
   1. purification of the water may include labeling processes;
   2. purification of the water may include chemical processes;
   3. water is good for drinking, it is nothing to be analysed;
   4. purification of the water may include biological processes;
   
   
2. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + CO₃^2- -> HCO₃^- + Cl^-
   2. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   3. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   4. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   
   
3. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   2. HCl + HO^- -> H₂O + Cl^-
   3. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   4. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   
   
4. For a water sample following measures may be quantitatively expressed:
   1. color;
   2. purity;
   3. hardness;
   4. permanent alkalinity;
   
   
5. In the laboratory the water were:
   1. alkalinized for drinking purposes;
   2. biologically purified using the resin column;
   3. acidified for drinking purposes;
   4. hardened using the resin column;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Putem spune urmatoarele:
   1. purificarea apei poate include procesele de etichetare;
   2. purificarea apei poate include procese chimice;
   3. apa este buna pentru consum, nu este nimic de a fi analizat;
   4. purificarea apei poate include procese biologice;
   5. purificarea apei poate include procedee fizice;
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + CO₃^2- -> HCO₃^- + Cl^-
   2. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   3. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   4. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   5. HCl + HO^- -> H₂O+Cl^-
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   2. HCl + HO^- -> H₂O + Cl^-
   3. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   4. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   5. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   
   
4. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. culoare;
   2. puritate;
   3. duritate;
   4. alcalinitate permanenta;
   5. aciditate minerala;
   
   
5. In laborator apa au fost:
   1. alcalinizeaza pentru baut;
   2. purificata biologic utilizānd coloana de rasina;
   3. acidulata pentru baut;
   4. calita folosind coloana de rasina;
   5. complexata prin metoda titrimetrica EDTA;
   
   

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

1. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an anion;
   2. when a gas is released its volume depends on the amount of metal corroded;
   3. the metal it changes its oxidation state becoming an cation;
   4. a gas is released only the corrosion of zinc;
   
   
2. The zinc plate:
   1. the volume is measured before and after immersing it in H₂SO₄;
   2. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   3. the mass is measured before and after immersing it in H₂SO₄;
   4. was involved in the volumetric method of corrosion analysis
   
   
3. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Zn -> H₂ + Zn²⁺
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
4. The aluminum plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was involved in the gravimetric method of corrosion analysis
   3. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   4. the volume is measured before and after immersing it in NaOH;
   
   
5. Corrosion of metals:
   1. is a beneficial process that shows the stability of metals;
   2. is the protection in time to chemical agents;
   3. may provide useful raw materials for analysis;
   4. can be reduced by passivation;
   
   

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

1. Īn procesele de coroziune studiate:
   1. metalul isi schimba starea de oxidare pentru a deveni un anion;
   2. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   3. metalul isi schimba starea de oxidare pentru a deveni un cation;
   4. un gaz este eliberat numai la corodarea zincului;
   5. īntotdeauna metalul isi schimba starea de oxidare;
   
   
2. Pentru placa de zinc:
   1. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   2. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   3. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   4. a fost implicata īn metoda volumetrica de analiza a coroziunii
   5. a fost corodata īn solutie sulfuric;
   
   
3. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Zn -> H₂ + Zn²⁺
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
4. Pentru placa de aluminiu:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   4. volumul se masoara īnainte si dupa imersia īn NaOH;
   
   
5. Coroziunea metalelor:
   1. este un proces benefic care arata stabilitatea metalelor;
   2. este protectia de durata impotriva agentilor chimici;
   3. poate furniza materii prime utile pentru analiza;
   4. poate fi redusa prin pasivare;
   
   

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

1. Corrosion of metals:
   1. may provide useful raw materials for analysis;
   2. can be reduced by passivation;
   3. can be reduced by electroplating;
   4. takes place merely from exposure to moisture in air;
   
   
2. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. Fe₂O₃ + CO -> Fe + CO₂
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
3. The aluminum plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was corroded in sodium hydroxide solution;
   3. the volume is measured before and after immersing it in NaOH;
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   
4. The zinc 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 gravimetric method of corrosion analysis
   3. was degreased in sulfuric acid solution;
   4. the volume is measured before and after immersing it in H₂SO₄;
   
   
5. In studied corrosion processes:
   1. a gas is released only the corrosion of aluminum;
   2. a gas is released only the corrosion of zinc;
   3. the metal it changes its oxidation state becoming an cation;
   4. the metal it changes its oxidation state becoming an anion;
   
   

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

1. Coroziunea metalelor:
   1. poate furniza materii prime utile pentru analiza;
   2. poate fi redusa prin pasivare;
   3. poate fi redusa prin galvanizare;
   4. are loc pur si simplu prin expunerea la umiditate īn aer;
   
   
2. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. Fe₂O₃ + CO -> Fe + CO₂
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. Al₂O₃ + NaOH -> NaAlO₂
   5. H⁺ + Zn -> H₂ + Zn²⁺
   
   
3. Pentru placa de aluminiu:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. a fost corodata īn solutie de hidroxid de sodiu;
   3. volumul se masoara īnainte si dupa imersia īn NaOH;
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   5. suprafata se masoara īnainte si dupa imersia īn NaOH;
   
   
4. Pentru placa de zinc:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. a fost degresata īn solutie de acid sulfuric;
   4. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   5. a fost corodata īn solutie sulfuric;
   
   
5. Īn procesele de coroziune studiate:
   1. un gaz este eliberat numai la corodarea aluminiului;
   2. un gaz este eliberat numai la corodarea zincului;
   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. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   
   

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

1. Corrosion of metals:
   1. takes place merely from exposure to moisture in air;
   2. can be reduced by passivation;
   3. may provide useful raw materials for analysis;
   4. is the protection in time to chemical agents;
   
   
2. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. ZnO + CO -> Zn + CO₂
   4. Fe₂O₃ + CO -> Fe + CO₂
   
   
3. The zinc plate:
   1. was degreased in sulfuric acid solution;
   2. the surface is measured before and after immersing it in H₂SO₄;
   3. was involved in the gravimetric method of corrosion analysis
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   
4. The aluminum plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was corroded in sodium hydroxide solution;
   3. the mass is measured before and after immersing it in NaOH;
   4. the volume is measured before and after immersing it in NaOH;
   
   
5. In studied corrosion processes:
   1. when a gas is released its volume depends on the amount of metal corroded;
   2. a gas is released only the corrosion of aluminum;
   3. a gas is released only the corrosion of zinc;
   4. the metal it changes its oxidation state becoming an anion;
   
   

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

1. Coroziunea metalelor:
   1. are loc pur si simplu prin expunerea la umiditate īn aer;
   2. poate fi redusa prin pasivare;
   3. poate furniza materii prime utile pentru analiza;
   4. este protectia de durata impotriva agentilor chimici;
   5. poate fi redusa prin galvanizare;
   
   
2. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. ZnO + CO -> Zn + CO₂
   4. Fe₂O₃ + CO -> Fe + CO₂
   
   
3. Pentru placa de zinc:
   1. a fost degresata īn solutie de acid sulfuric;
   2. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   3. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
4. Pentru placa de aluminiu:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. a fost corodata īn solutie de hidroxid de sodiu;
   3. masa este masurata īnainte si dupa imersia īn NaOH;
   4. volumul se masoara īnainte si dupa imersia īn NaOH;
   5. suprafata se masoara īnainte si dupa imersia īn NaOH;
   
   
5. Īn procesele de coroziune studiate:
   1. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   2. un gaz este eliberat numai la corodarea aluminiului;
   3. un gaz este eliberat numai la corodarea zincului;
   4. metalul isi schimba starea de oxidare pentru a deveni un anion;
   5. īntotdeauna metalul isi schimba starea de oxidare;
   
   

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

1. The aluminum plate:
   1. was corroded in sodium hydroxide solution;
   2. the volume is measured before and after immersing it in NaOH;
   3. the surface is measured before and after immersing it in NaOH;
   4. was degreased in sodium hydroxide solution;
   
   
2. The zinc plate:
   1. the mass is measured before and after immersing it in H₂SO₄;
   2. was degreased in sulfuric acid solution;
   3. the volume is measured before and after immersing it in H₂SO₄;
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   
3. Which of the following reactions may be called as of corrosion:
   1. ZnO + CO -> Zn + CO₂
   2. Fe₂O₃ + CO -> Fe + CO₂
   3. H⁺ + Ni -> H₂ + Ni²⁺
   4. Ni(CO)₄ -> Ni + CO
   
   
4. Corrosion of metals:
   1. is the destruction of metals under the action of external factors;
   2. can be reduced by electroplating;
   3. is the protection in time to chemical agents;
   4. is helping in the process of cleaning the metals surfaces;
   
   
5. 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. the metal it changes its oxidation state becoming an cation;
   4. a gas is released only the corrosion of zinc;
   
   

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. volumul se masoara īnainte si dupa imersia īn NaOH;
   3. suprafata se masoara īnainte si dupa imersia īn NaOH;
   4. a fost degresata īn solutie de hidroxid de sodiu;
   
   
2. Pentru placa de zinc:
   1. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   2. a fost degresata īn solutie de acid sulfuric;
   3. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   5. a fost corodata īn solutie sulfuric;
   
   
3. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. ZnO + CO -> Zn + CO₂
   2. Fe₂O₃ + CO -> Fe + CO₂
   3. H⁺ + Ni -> H₂ + Ni²⁺
   4. Ni(CO)₄ -> Ni + CO
   
   
4. Coroziunea metalelor:
   1. este distrugerea metalelor sub actiunea factorilor externi;
   2. poate fi redusa prin galvanizare;
   3. este protectia de durata impotriva agentilor chimici;
   4. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   
   
5. 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. metalul isi schimba starea de oxidare pentru a deveni un cation;
   4. un gaz este eliberat numai la corodarea zincului;
   5. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   
   

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

1. The aluminum plate:
   1. was involved in the volumetric method of corrosion analysis
   2. the surface is measured before and after immersing it in NaOH;
   3. was corroded in sodium hydroxide solution;
   4. the mass is measured before and after immersing it in NaOH;
   
   
2. In studied corrosion processes:
   1. a gas is released only the corrosion of zinc;
   2. the metal it changes its oxidation state becoming an anion;
   3. a gas is released only the corrosion of aluminum;
   4. a gas is released at both corrosion of zinc and aluminum;
   
   
3. Corrosion of metals:
   1. is a beneficial process that shows the stability of metals;
   2. is the protection in time to chemical agents;
   3. is the destruction of metals under the action of external factors;
   4. can be reduced by electroplating;
   
   
4. The zinc plate:
   1. the surface is measured before and after immersing it in H₂SO₄;
   2. was degreased in sulfuric acid solution;
   3. was corroded in sulfuric solution;
   4. was involved in the gravimetric method of corrosion analysis
   
   
5. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   

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

1. Pentru placa de aluminiu:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. suprafata se masoara īnainte si dupa imersia īn NaOH;
   3. a fost corodata īn solutie de hidroxid de sodiu;
   4. masa este masurata īnainte si dupa imersia īn NaOH;
   5. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
2. Īn procesele de coroziune studiate:
   1. un gaz este eliberat numai la corodarea zincului;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. un gaz este eliberat numai la corodarea aluminiului;
   4. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   5. metalul isi schimba starea de oxidare pentru a deveni un cation;
   
   
3. Coroziunea metalelor:
   1. este un proces benefic care arata stabilitatea metalelor;
   2. este protectia de durata impotriva agentilor chimici;
   3. este distrugerea metalelor sub actiunea factorilor externi;
   4. poate fi redusa prin galvanizare;
   5. poate fi redusa prin pasivare;
   
   
4. Pentru placa de zinc:
   1. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   2. a fost degresata īn solutie de acid sulfuric;
   3. a fost corodata īn solutie sulfuric;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
5. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. At the nickel plating following reactions took place:
   1. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   2. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   3. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   4. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the cathode: O^2- - 2e^- -> O₂⁰
   
   
2. The intensity of the current:
   1. is to be calculated before to start the experiment;
   2. it depends on the surface of the sample;
   3. does not affect the quality nor the quantity of the nickel deposition;
   4. affect only the quality of the nickel deposition;
   
   
3. Theoretical mass of nickel deposited is calculated using:
   1. law of mass action;
   2. solutions laws;
   3. the electrolysis law;
   4. perfect gas law;
   
   
4. It is expected to have a mass of nickel deposited:
   1. inversely proportional with the intensity of the current used;
   2. lower than the calculated theoretical one;
   3. higher than the calculated theoretical one;
   4. proportional with the nickel plating time;
   
   
5. Electrical conductivity of nickel salts solutions:
   1. is reduced by salts additions;
   2. depends on the intensity of the current used;
   3. depends on the potential of the source used;
   4. is relatively small;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. Electrical conductivity of nickel salts solutions:
   1. is relatively small;
   2. is relatively high;
   3. is improved by salts additions;
   4. depends on the potential of the source used;
   
   
2. The intensity of the current:
   1. affect only the quality of the nickel deposition;
   2. affect only the quantity of the nickel deposition;
   3. is to be calculated after conducting the experiment;
   4. is to be adjusted when the experiment starts;
   
   
3. Theoretical mass of nickel deposited is calculated using:
   1. perfect gas law;
   2. the conservation of the energy law;
   3. solutions laws;
   4. law of mass action;
   
   
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, Ni²⁺ + 2e^- -> Ni⁰
   3. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   4. at anode (+), connected with nickel piece, Ni²⁺ + 2e^- -> Ni⁰
   
   
5. 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. much lower than the calculated theoretical one;
   4. proportional with the nickel plating time;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este relativ mica;
   2. este relativ mare;
   3. este īmbunatatita prin adaosuri de saruri;
   4. depinde de potentialul sursei utilizate;
   
   
2. Intensitatea curentului:
   1. afecteaza numai calitatea depunerii nichelului;
   2. afecteaza numai cantitatea de nichel depus;
   3. se calculeaza dupa efectuarea experimentului;
   4. trebuie sa fie ajustata cand se incepe experimentul;
   
   
3. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea gazelor perfecte;
   2. legea conservarii energiei;
   3. legea solutilor;
   4. legea actiunii maselor;
   
   
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 contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   3. la anod (+), īn contact cu piesa de nichel, Ni⁰ - 2e^- -> Ni²⁺
   4. la anod (+), īn legatura cu piesa de nichel, Ni²⁺ + 2e^- -> Ni⁰
   
   
5. 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. mult mai mica decāt cea teoretica calculata;
   4. proportionala cu timpul de nichelare;
   5. proportionala cu suprafata probei;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. At the nickel plating following reactions took place:
   1. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the anode: O^2- - 2e^- -> O₂⁰
   2. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   3. at cathode (-), connected with metallic piece, Ni⁰ - 2e^- -> Ni²⁺
   4. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the cathode: O^2- - 2e^- -> O₂⁰
   
   
2. Theoretical mass of nickel deposited is calculated using:
   1. the conservation of the number of atoms for each element law;
   2. law of mass action;
   3. perfect gas law;
   4. the conservation of the energy law;
   
   
3. It is expected to have a mass of nickel deposited:
   1. inversely proportional with the surface of the sample;
   2. higher than the calculated theoretical one;
   3. proportional with the intensity of the current used;
   4. much higher than the calculated theoretical one;
   
   
4. Electrical conductivity of nickel salts solutions:
   1. is relatively high;
   2. is relatively small;
   3. is reduced by salts additions;
   4. is improved by salts additions;
   
   
5. The intensity of the current:
   1. does not affect the quality nor the quantity of the nickel deposition;
   2. affect only the quality of the nickel deposition;
   3. is to be calculated before to start the experiment;
   4. is to be adjusted when the experiment starts;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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