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. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. H⁺ + HO^- \=\ H₂O
   3. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   4. H₂O \=\ H⁺ + HO^-
   
   
2. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. are considered to be at the same temperature, but may have different speeds;
   2. all are moving in the same direction;
   3. all are moving in an arbitrary direction;
   4. are considered to be at the same temperature, but may have different energies;
   
   
3. The time to the formation of the ring in the experiment is dependent on:
   1. the mode energy or mode speed of each involved species;
   2. the average energy or average speed of each involved species;
   3. the length of the tube and not of the width of the tube;
   4. the propagation of the species as neutral molecules and not as ions;
   
   
4. The position of the ring in the experiment is dependent on:
   1. the length of the tube and not of the width of the tube;
   2. the propagation of the species as neutral molecules and not as ions;
   3. the average energy or average speed of each involved species;
   4. the propagation of the species as ions and not as neutral molecules;
   
   
5. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory or our breathing;
   2. formation of ammonium chloride;
   3. presence of the ammonia;
   4. unproper illumination in the laboratory and 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. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. H⁺ + HO^- \=\ H₂O
   3. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   4. H₂O \=\ H⁺ + HO^-
   
   
2. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   2. toate se deplaseaza īn aceeasi directie;
   3. toate se īndreapta īntr-o directie arbitrara;
   4. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   
   
3. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. viteza la moda sau energia la moda a fiecarei specii implicate;
   2. energia medie sau viteza medie a fiecarei specii implicate;
   3. lungimea tubului si nu latimea tubului;
   4. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   5. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   
   
4. Pozitia inelului īn experimentul este dependenta de:
   1. lungimea tubului si nu latimea tubului;
   2. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   3. energia medie sau viteza medie a fiecarei specii implicate;
   4. propagarea speciilor ca ionii si nu ca si molecule neutre;
   5. viteza de difuzie a fiecarei specii implicate;
   
   
5. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   2. formarea clorurii de amoniu;
   3. prezentei amoniacului;
   4. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   5. experimentului nostru proiectat pentru a captura produsul de reactie;
   
   

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

1. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all have same energy;
   2. all are moving in the same direction;
   3. all have same speed;
   4. are considered to be at the same temperature, but may have different speeds;
   
   
2. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the diffusion coefficients;
   2. to keep us busy;
   3. extracting the information necessary to calculate the speeds ratio;
   4. synchronization of the diffusion times;
   
   
3. The fog observed during the experiment is due to:
   1. formation of ammonium chloride;
   2. presence of the ammonia;
   3. unproper illumination in the laboratory or our breathing;
   4. our experiment designed to trap the product of the reaction;
   
   
4. The position of the ring in the experiment is dependent on:
   1. the length of the tube and the width of the tube;
   2. the real speeds and not the virtual speeds of each involved species;
   3. the propagation of the species as neutral molecules and not as ions;
   4. the speed of diffusion of each involved species;
   
   
5. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + HCl \=\ NH₄Cl
   2. H₂O \=\ H⁺ + HO^-
   3. NH₄⁺ + Cl^- \=\ NH₄Cl
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   

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

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

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

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

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

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

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

1. The position of the ring in the experiment is dependent on:
   1. the propagation of the species as ions and not as neutral molecules;
   2. the width of the tube and not of the length of the tube;
   3. the length of the tube and not of the width of the tube;
   4. the speed of diffusion of each involved species;
   
   
2. The time to the formation of the ring in the experiment is dependent on:
   1. the width of the tube and not of the length of the tube;
   2. the propagation of the species as neutral molecules and not as ions;
   3. the length of the tube and the width of the tube;
   4. the length of the tube and not of the width of the tube;
   
   
3. At the ends of the tube following equilibrium reactions occurs:
   1. HCl + H₂O \=\ Cl^- + H₃O⁺
   2. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   3. H₂O \=\ H⁺ + HO^-
   4. NH₃ + HCl \=\ NH₄Cl
   
   
4. The fog observed during the experiment is due to:
   1. formation of ammonium chloride;
   2. unproper illumination in the laboratory and our breathing;
   3. presence of the chlorine;
   4. presence of the ammonia;
   
   
5. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all have same speed;
   2. all have same energy;
   3. all are moving in an arbitrary direction;
   4. all are moving in the same direction;
   
   

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

1. Pozitia inelului īn experimentul este dependenta de:
   1. propagarea speciilor ca ionii si nu ca si molecule neutre;
   2. latimea tubului si nu lungimea tubului;
   3. lungimea tubului si nu latimea tubului;
   4. viteza de difuzie a fiecarei specii implicate;
   
   
2. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. latimea tubului si nu lungimea tubului;
   2. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   3. lungimea tubului si latimea tubului;
   4. lungimea tubului si nu latimea tubului;
   5. propagarea speciilor ca ionii si nu ca si molecule neutre;
   
   
3. La capetele tubului urmatoarele reactii de echilibru apar:
   1. HCl + H₂O \=\ Cl^- + H₃O⁺
   2. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   3. H₂O \=\ H⁺ + HO^-
   4. NH₃ + HCl \=\ NH₄Cl
   5. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
4. Ceata observata īn timpul experimentului se datoreaza:
   1. formarea clorurii de amoniu;
   2. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   3. prezentei clorului;
   4. prezentei amoniacului;
   5. experimentului nostru proiectat pentru a captura produsul de reactie;
   
   
5. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate au aceeasi viteza;
   2. toate au aceeasi energie;
   3. toate se īndreapta īntr-o directie arbitrara;
   4. toate se deplaseaza īn aceeasi directie;
   
   

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

1. The time to the formation of the ring in the experiment is dependent on:
   1. the length of the tube and not of the width of the tube;
   2. the propagation of the species as neutral molecules and not as ions;
   3. the virtual speeds and not the real speeds of each involved species;
   4. the speed of diffusion of each involved species;
   
   
2. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. are considered to be at the same temperature, but may have different energies;
   2. all are moving in an arbitrary direction;
   3. all are moving in the same direction;
   4. all have same speed;
   
   
3. The fog observed during the experiment is due to:
   1. presence of the ammonia;
   2. unproper illumination in the laboratory and our breathing;
   3. formation of ammonium chloride;
   4. presence of the chlorine;
   
   
4. The position of the ring in the experiment is dependent on:
   1. the mode energy or mode speed of each involved species;
   2. the real speeds and not the virtual speeds of each involved species;
   3. the concentrations of the solutions used;
   4. the length of the tube and not of the width of the tube;
   
   
5. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + HCl \=\ NH₄Cl
   2. H₂O \=\ H⁺ + HO^-
   3. H⁺ + HO^- \=\ H₂O
   4. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   
   

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

1. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. lungimea tubului si nu latimea tubului;
   2. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   3. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   4. viteza de difuzie a fiecarei specii implicate;
   
   
2. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   2. toate se īndreapta īntr-o directie arbitrara;
   3. toate se deplaseaza īn aceeasi directie;
   4. toate au aceeasi viteza;
   
   
3. Ceata observata īn timpul experimentului se datoreaza:
   1. prezentei amoniacului;
   2. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   3. formarea clorurii de amoniu;
   4. prezentei clorului;
   
   
4. Pozitia inelului īn experimentul este dependenta de:
   1. viteza la moda sau energia la moda a fiecarei specii implicate;
   2. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   3. concentratiile solutiilor utilizate;
   4. lungimea tubului si nu latimea tubului;
   
   
5. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₃ + HCl \=\ NH₄Cl
   2. H₂O \=\ H⁺ + HO^-
   3. H⁺ + HO^- \=\ H₂O
   4. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   
   

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

1. In the laboratory were studied:
   1. the producing of some gas as result of a lost of the mass of a solid;
   2. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   3. increasing of the temperature of a solid mass when was heated;
   4. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   
   
2. A state equation for a real gas is:
   1. a relation which takes into account certain deviations from the ideal model;
   2. a relation between an certain number of state parameters;
   3. usable in the laboratory, but is not to be used somewhere else;
   4. a relation which may involve some constants dependent of gas composition;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   2. KClO₃ -> KCl + O₂;
   3. H₂O₂ -> H₂O + O₂;
   4. distillation of the liquid air;
   
   
4. 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 much higher than in liquid state;
   4. the pressure is much lower than in liquid state;
   
   
5. 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. the ideal model of a gas approximated the worst the behavior of the released gas;
   4. ozone were released as result of the decomposition;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Īn laborator s-au studiat:
   1. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   2. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   3. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   
   
2. 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 īntre un anumit numar de parametri de stare;
   3. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   4. o relatie care poate implica unele constante dependente de compozitia gazului;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   2. KClO₃ -> KCl + O₂;
   3. H₂O₂ -> H₂O + O₂;
   4. distilarea aerului lichid;
   
   
4. 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 mult mai mare decāt īn stare lichida;
   4. presiunea este mult mai mica decāt īn stare lichida;
   
   
5. 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. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   4. ozonul au fost eliberat ca urmare a descompunerii;
   
   

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

1. The values taken from the experiment conducted in the laboratory indicated that:
   1. oxigen were released as result of the decomposition;
   2. the ideal model of a gas approximated the worst the behavior of the released gas;
   3. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   4. the ideal model of a gas approximated the best the behavior of the released gas;
   
   
2. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KNO₃ -> KNO₂ + O₂;
   2. KNO₂ + O₂ -> KNO₃;
   3. distillation of the liquid air;
   4. H₂O + O₂ -> H₂O₂;
   
   
3. For gaseous state:
   1. the pressure is approximately the same as in liquid state;
   2. the pressure depends on the model which are used to approximate it;
   3. the pressure is unchanged when a chemical reaction occurs;
   4. the pressure is subject to change when a chemical reaction occurs;
   
   
4. A state equation for a real gas is:
   1. a relation which may involve some constants dependent of gas composition;
   2. a relation between an unlimited number of state parameters;
   3. usable in the laboratory, but is not to be used somewhere else;
   4. a relation derived to approximate the relation between state parameters;
   
   
5. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. the lost of the mass of a solid as result of producing of some gas;
   3. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   4. increasing of the pressure of a gas when was heated;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. oxigenul au fost eliberat ca urmare a descompunerii;
   2. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   3. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   4. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   5. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
2. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KNO₃ -> KNO₂ + O₂;
   2. KNO₂ + O₂ -> KNO₃;
   3. distilarea aerului lichid;
   4. H₂O + O₂ -> H₂O₂;
   
   
3. Pentru stare gazoasa:
   1. presiunea este aproximativ aceeasi ca si īn stare lichida;
   2. presiunea depinde de modelul care este utilizat pentru o aproxima;
   3. presiunea este neschimbata cānd apare o reactie chimica;
   4. presiunea se pot modifica atunci cānd apare o reactie chimica;
   
   
4. O ecuatie de stare pentru un gaz real este:
   1. o relatie care poate implica unele constante dependente de compozitia gazului;
   2. o relatie īntre un numar nelimitat de parametri de stare;
   3. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   4. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   
   
5. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. pierdut din masa de solid ca urmare a producerii unor gaze;
   3. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   4. cresterea presiunii unui gaz cānd s-a īncalzit;
   5. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   
   

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

1. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. Ag₂O -> Ag + O₂;
   2. H₂O₂ -> H₂O + O₂;
   3. KNO₃ -> KNO₂ + O₂;
   4. KCl + O₂ -> KClO₃;
   
   
2. The values taken from the experiment conducted in the laboratory indicated that:
   1. oxigen were released as result of the decomposition;
   2. ozone were released as result of the decomposition;
   3. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   4. we possess enough information to decide what gas was released from the reaction;
   
   
3. For gaseous state:
   1. the pressure is subject to change when a chemical reaction occurs;
   2. it exists an equation for all, p · V = n · R · T;
   3. we need to take supplementary precautions in the laboratory;
   4. the pressure is unchanged when a chemical reaction occurs;
   
   
4. A state equation for a real gas is:
   1. a relation which takes into account certain deviations from the ideal model;
   2. a relation obtained after conducting of the experiment;
   3. a relation which is always true, independent of the values of the state parameters;
   4. usable in the laboratory, but is not to be used somewhere else;
   
   
5. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   2. the producing of some gas as result of a lost of the mass of a solid;
   3. the lost of the mass of a solid as result of producing of some gas;
   4. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. Ag₂O -> Ag + O₂;
   2. H₂O₂ -> H₂O + O₂;
   3. KNO₃ -> KNO₂ + O₂;
   4. KCl + O₂ -> KClO₃;
   
   
2. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. oxigenul au fost eliberat ca urmare a descompunerii;
   2. ozonul au fost eliberat ca urmare a descompunerii;
   3. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   4. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   5. aer a fost eliberat ca urmare a descompunerii;
   
   
3. Pentru stare gazoasa:
   1. presiunea se pot modifica atunci cānd apare o reactie chimica;
   2. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   3. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   4. presiunea este neschimbata cānd apare o reactie chimica;
   
   
4. O ecuatie de stare pentru un gaz real este:
   1. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   2. o relatie obtinut dupa efectuarea experimentului;
   3. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor 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;
   
   
5. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   2. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   3. pierdut din masa de solid ca urmare a producerii unor gaze;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   5. cresterea presiunii unui gaz cānd s-a īncalzit;
   
   

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

1. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KCl + O₂ -> KClO₃;
   2. KNO₂ + O₂ -> KNO₃;
   3. KNO₃ -> KNO₂ + O₂;
   4. H₂O + O₂ -> H₂O₂;
   
   
2. 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 approximately the same as in liquid state;
   4. the pressure is much higher than in liquid state;
   
   
3. In the laboratory were studied:
   1. increasing of the pressure of a gas when was heated;
   2. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   3. increasing of the temperature of a solid mass when was heated;
   4. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   
   
4. A state equation for a real gas is:
   1. a relation which takes into account certain deviations from the ideal model;
   2. a relation between an certain number of state parameters;
   3. a relation between an unlimited number of state parameters;
   4. a relation which is always true, independent of the values of the state parameters;
   
   
5. The values taken from the experiment conducted in the laboratory indicated that:
   1. we do not possess enough information to decide what gas was released from the reaction;
   2. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   3. we possess enough information to decide what gas was released from the reaction;
   4. the ideal model of a gas approximated the worst the behavior of the released gas;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KCl + O₂ -> KClO₃;
   2. KNO₂ + O₂ -> KNO₃;
   3. KNO₃ -> KNO₂ + O₂;
   4. H₂O + O₂ -> H₂O₂;
   
   
2. 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 aproximativ aceeasi ca si īn stare lichida;
   4. presiunea este mult mai mare decāt īn stare lichida;
   5. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   
   
3. Īn laborator s-au studiat:
   1. cresterea presiunii unui gaz cānd s-a īncalzit;
   2. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   3. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   
   
4. O ecuatie de stare pentru un gaz real este:
   1. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   2. o relatie īntre un anumit numar de parametri de stare;
   3. o relatie īntre un numar nelimitat de parametri de stare;
   4. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   
   
5. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   2. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   4. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   
   

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

1. The values taken from the experiment conducted in the laboratory indicated that:
   1. air 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. we do not possess enough information to decide what gas was released from the reaction;
   
   
2. For gaseous state:
   1. the pressure depends on the model which are used to approximate it;
   2. the pressure is much lower than in liquid state;
   3. the pressure is much higher than in liquid state;
   4. it exists an equation for all, p · V = n · R · T;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O₂ -> H₂O + O₂;
   2. distillation of the liquid air;
   3. KNO₂ + O₂ -> KNO₃;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   
4. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. the lost of the mass of a solid as result of producing of some gas;
   3. increasing of the temperature of a solid mass when was heated;
   4. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   
   
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 between an unlimited number of state parameters;
   3. a relation derived to approximate the relation between state parameters;
   4. a relation obtained after conducting of the experiment;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. aer a 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. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
2. Pentru stare gazoasa:
   1. presiunea depinde de modelul care este utilizat pentru o aproxima;
   2. presiunea este mult mai mica decāt īn stare lichida;
   3. presiunea este mult mai mare decāt īn stare lichida;
   4. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O₂ -> H₂O + O₂;
   2. distilarea aerului lichid;
   3. KNO₂ + O₂ -> KNO₃;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   5. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   
   
4. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. pierdut din masa de solid ca urmare a producerii unor gaze;
   3. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   5. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   
   
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 īntre un numar nelimitat de parametri de stare;
   3. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   4. o relatie obtinut dupa efectuarea experimentului;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When lead is identified:
   1. a blue complex appears;
   2. dangerous substances are used;
   3. a violet complex appears;
   4. a heat release is observed;
   
   
2. The paper requires before analysis of the sample:
   1. to measure its surface;
   2. to be moistened with an electrolyte;
   3. to be weighted;
   4. to be dry;
   
   
3. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   
   
4. When the electrical circuit is closed:
   1. electric current avoids the sample and the paper;
   2. cations from the solution are passed into sample as metals;
   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;
   
   
5. This method of analysis of metals and alloys is:
   1. useful for alloys, not so useful for metals;
   2. too ancient to be used today in the laboratory;
   3. a destructive method of analysis;
   4. a quantitative method of analysis;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd plumbul este identificat:
   1. apare un complex albastru;
   2. sunt utilizate substante periculoase;
   3. apare un complex violet;
   4. se observa o eliberare de caldura;
   
   
2. Hartia necesita ca īnainte de analiza probei:
   1. sa i se masoare suprafata;
   2. sa fie umezita cu un electrolit;
   3. sa fie cantarita;
   4. sa fie uscata;
   5. sa fie arsa;
   
   
3. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   
   
4. Cānd circuitul electric este īnchis:
   1. curent electric evita proba si hārtia;
   2. cationii din solutie sunt trecuti īn proba ca metale;
   3. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   4. elemente din solutie sunt trecute īn proba ca metale;
   
   
5. Aceasta metoda de analiza de metale si aliaje este:
   1. utila pentru aliaje, nu atāt de utila pentru metale;
   2. prea veche pentru a fi utilizata īn prezent īn laborator;
   3. o metoda distructiva de analiza;
   4. o metoda cantitativa de analiza;
   5. nu este utila nici pentru metale nici pentru aliaje;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   3. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
2. The paper requires before analysis of the sample:
   1. to be tested;
   2. to be burned;
   3. to be moistened with an electrolyte;
   4. to be cut in small pieces;
   
   
3. When aluminum is identified:
   1. there are many identification reactions possible;
   2. is identified as Al²⁺ cation;
   3. using of alizarin along with ammonium hidroxide provide a red colored complex;
   4. the presence of other ions may produce a true negative outcome;
   
   
4. When the electrical circuit is closed:
   1. surface of the sample is fastly covered by a protecting shield of electrons;
   2. elements from the solution are passed into sample as metals;
   3. cations from the solution are passed into sample as metals;
   4. anions from the solution are passed into sample as metals;
   
   
5. When lead is identified:
   1. a red-brown complex appears;
   2. a blue complex appears;
   3. the reactions used clearly indicates its presence;
   4. precautions should be made for toxic wastes disposal;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   3. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   5. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   
   
2. Hartia necesita ca īnainte de analiza probei:
   1. sa fie testata;
   2. sa fie arsa;
   3. sa fie umezita cu un electrolit;
   4. sa fie taiata īn bucati mici;
   5. sa fie acidulata;
   
   
3. Cānd aluminiu este identificat:
   1. exista multe reactii posibile de identificare;
   2. este identificat ca cationul Al²⁺;
   3. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   4. prezenta altor ioni poate produce un rezultat adevarat negativ;
   
   
4. Cānd circuitul electric este īnchis:
   1. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   2. elemente din solutie sunt trecute īn proba ca metale;
   3. cationii din solutie sunt trecuti īn proba ca metale;
   4. anionii din solutie sunt trecuti īn proba ca metale;
   5. curent electric trece prin proba si hārtie;
   
   
5. Cānd plumbul este identificat:
   1. apare un complex rosu-brun;
   2. apare un complex albastru;
   3. reactiile utilizate īn mod clar ii indica prezenta;
   4. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   5. se observa o eliberare de caldura;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When aluminum is identified:
   1. using of alizarin along with ammonium hidroxide provide a red colored complex;
   2. is identified as Al²⁺ cation;
   3. the presence of other ions may produce a false negative outcome;
   4. there are many identification reactions possible;
   
   
2. 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⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   
   
3. This method of analysis of metals and alloys is:
   1. too ancient to be used today in the laboratory;
   2. useful for both metals and alloys;
   3. not useful for both metals and alloys;
   4. a gravimetric method of analysis;
   
   
4. When lead is identified:
   1. a blue complex appears;
   2. a violet complex appears;
   3. interference of other ions may affect the outcome;
   4. a heat release is observed;
   
   
5. When the electrical circuit is closed:
   1. cations from the solution are passed into sample as metals;
   2. elements from the metals are passed into solution as anions;
   3. elements from the metals are passed into solution as cations;
   4. anions from the solution are passed into sample as metals;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd aluminiu este identificat:
   1. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   2. este identificat ca cationul Al²⁺;
   3. prezenta altor ioni poate produce un rezultat fals negativ;
   4. exista multe reactii posibile de identificare;
   5. doar o reactie de identificare este posibila;
   
   
2. 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⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   5. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
3. Aceasta metoda de analiza de metale si aliaje este:
   1. prea veche pentru a fi utilizata īn prezent īn laborator;
   2. utila atāt pentru metale si aliaje;
   3. nu este utila nici pentru metale nici pentru aliaje;
   4. o metoda gravimetrica de analiza;
   
   
4. Cānd plumbul este identificat:
   1. apare un complex albastru;
   2. apare un complex violet;
   3. interferenta altor ioni poate afecta rezultatul;
   4. se observa o eliberare de caldura;
   
   
5. Cānd circuitul electric este īnchis:
   1. cationii din solutie sunt trecuti īn proba ca metale;
   2. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   3. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   4. anionii din solutie sunt trecuti īn proba ca metale;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When aluminum is identified:
   1. the presence of other ions may produce a false positive outcome;
   2. the presence of other ions may produce a true positive outcome;
   3. there are many identification reactions possible;
   4. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   
   
2. Why moisten the paper with solution of sodium nitrate?
   1. for the paper to work as isolator;
   2. to have something to do in the laboratory;
   3. for stopping after a while the chemical reaction that takes place;
   4. to provide cations for analysis;
   
   
3. The paper requires before analysis of the sample:
   1. to be cut in small pieces;
   2. to be burned;
   3. to measure its surface;
   4. to be dry;
   
   
4. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as anions;
   2. elements from the metals are passed into solution as cations;
   3. elements from the solution are passed into sample as metals;
   4. anions from the solution are passed into sample as metals;
   
   
5. When lead is identified:
   1. a heat release is observed;
   2. a yellow complex appears;
   3. the reactions used clearly indicates its presence;
   4. a red-brown complex appears;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd aluminiu este identificat:
   1. prezenta altor ioni poate produce un rezultat fals pozitiv;
   2. prezenta altor ioni poate produce un rezultat adevarat pozitiv;
   3. exista multe reactii posibile de identificare;
   4. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   
   
2. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru ca hartia sa actioneze ca izolator;
   2. pentru a avea ceva de a face īn laborator;
   3. pentru oprirea dupa un timp reactiei chimice care are loc;
   4. pentru furniza cationi pentru analiza;
   5. sa fie taiat cu usurinta cu foarfeca;
   
   
3. Hartia necesita ca īnainte de analiza probei:
   1. sa fie taiata īn bucati mici;
   2. sa fie arsa;
   3. sa i se masoare suprafata;
   4. sa fie uscata;
   
   
4. Cānd circuitul electric este īnchis:
   1. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   2. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   3. elemente din solutie sunt trecute īn proba ca metale;
   4. anionii din solutie sunt trecuti īn proba ca metale;
   
   
5. Cānd plumbul este identificat:
   1. se observa o eliberare de caldura;
   2. apare un complex galben;
   3. reactiile utilizate īn mod clar ii indica prezenta;
   4. apare un complex rosu-brun;
   5. apare un complex albastru;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When lead is identified:
   1. interference of other ions may affect the outcome;
   2. a red-brown complex appears;
   3. a heat release is observed;
   4. dangerous substances are used;
   
   
2. Why moisten the paper with solution of sodium nitrate?
   1. to be cut easily with scissors;
   2. for the paper to work as isolator;
   3. to provide cations for analysis;
   4. to accomodate ourselves to use chemicals;
   
   
3. When aluminum is identified:
   1. is identified as Al³⁺ cation;
   2. only one identification reaction is possible;
   3. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   4. the presence of other ions may produce a true negative outcome;
   
   
4. The paper requires before analysis of the sample:
   1. to be dry;
   2. to be tested;
   3. to be cut in small pieces;
   4. to be burned;
   
   
5. The electric charges after passing the metals into solution may be:
   1. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd plumbul este identificat:
   1. interferenta altor ioni poate afecta rezultatul;
   2. apare un complex rosu-brun;
   3. se observa o eliberare de caldura;
   4. sunt utilizate substante periculoase;
   
   
2. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. sa fie taiat cu usurinta cu foarfeca;
   2. pentru ca hartia sa actioneze ca izolator;
   3. pentru furniza cationi pentru analiza;
   4. sa ne acomodam in a utiliza substante chimice;
   
   
3. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al³⁺;
   2. doar o reactie de identificare este posibila;
   3. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   4. prezenta altor ioni poate produce un rezultat adevarat negativ;
   5. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   
   
4. Hartia necesita ca īnainte de analiza probei:
   1. sa fie uscata;
   2. sa fie testata;
   3. sa fie taiata īn bucati mici;
   4. sa fie arsa;
   5. sa fie umezita cu un electrolit;
   
   
5. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   4. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The indicator should be added:
   1. only at the suggestion of the supervisor;
   2. to indicate our safety limits when we dealt with chemicals;
   3. in large quantities, according to the principle 'only size matters';
   4. to provide a color change at equivalence point;
   
   
2. The density of the solutions depends on:
   1. provider;
   2. temperature;
   3. concentration;
   4. pressure;
   
   
3. The following chemical reactions were used in the experiments:
   1. H₂O + CO₂ -> H₂CO₃
   2. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   3. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
4. 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 oxidation states of some participants to the reaction;
   4. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
5. Reactions between acids and bases:
   1. are rarely useful, and even rarely used;
   2. have as a consequence the dissolution of a salt;
   3. are all exothermic, being therefore dangerous outside of the laboratory;
   4. have as effect the change of the color of a solution;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Trebuie adaugat indicatorul:
   1. numai la sugestia supraveghetorului;
   2. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   3. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   4. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   5. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   
   
2. Densitatea solutiilor depinde de:
   1. furnizor;
   2. temperatura;
   3. concentratie;
   4. presiune;
   
   
3. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. H₂O + CO₂ -> H₂CO₃
   2. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   3. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   5. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   
   
4. 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 oxidare ale unor participanti la reactie;
   4. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
5. Reactiile īntre acizi si baze:
   1. sunt rareori utile, si chiar mai rar utilizate;
   2. au drept consecinta dizolvarea unei sari;
   3. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   4. au ca efect schimbarea culorii unei solutii;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. In the calculations:
   1. are necessary to use our phones;
   2. are necessary to take the results imediatly after these are available from others;
   3. are necessary to discuss with our colleagues;
   4. are necessary to establish the coefficients of the chemical reaction;
   
   
2. Titration as a laboratory operation involves:
   1. a pH indicator that changes color depending on the pH of the solution;
   2. a salt solution;
   3. a natrium hydroxide solution;
   4. a mass measurement;
   
   
3. The density of the solutions depends on:
   1. pressure;
   2. quantity;
   3. provider;
   4. temperature;
   
   
4. A redox process:
   1. involves a transfer of electrons from one atom or group of atoms to another;
   2. involves changing of the aggregation states of some participants to the reaction;
   3. involves changing of the oxidation states of some participants to the reaction;
   4. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
5. The equivalence point is:
   1. the point in which a reactive should be added in the reaction flask;
   2. something rarely encountered in chemistry;
   3. the point in which a reactive should be added in the burette;
   4. indicated when a color change is observed into the solution;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. In calcule:
   1. este necesar sa utilizam telefoanele;
   2. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   3. este necesar sa discutam cu colegii;
   4. este necesara stabilirea coeficientilor reactiei chimice;
   
   
2. Titrarea ca o operatiune de laborator implica:
   1. un indicator de pH care īsi schimba culoarea īn functie de pH-ul solutiei;
   2. o solutie de sare;
   3. o solutie de hidroxid de sodiu;
   4. masurarea masei;
   
   
3. Densitatea solutiilor depinde de:
   1. presiune;
   2. cantitate;
   3. furnizor;
   4. temperatura;
   5. concentratie;
   
   
4. Un proces redox:
   1. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   2. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   3. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   4. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   5. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
5. Punctul de echivalenta este:
   1. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   2. ceva rar īntālnit īn chimie;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   4. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   5. folosit pentru a echilibra ecuatia;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The equivalence point is:
   1. indicated when a color change is observed into the solution;
   2. the point in which a reactive is fully consumed in the reaction;
   3. the point in which a reactive should be added in the burette;
   4. used to balance the equation;
   
   
2. 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
   
   
3. When a chemical reaction is balanced, following should be considered:
   1. the principle of the conservation of the volume;
   2. the principle of the conservation of the energy;
   3. all glassware should be clean before and after conducting the experiment;
   4. the principle of the conservation of the number of atoms for each element;
   
   
4. A redox process:
   1. is always fast and safe;
   2. occurs only when we mix wrong substances in the laboratory;
   3. involves a transfer of electrons from one atom or group of atoms to another;
   4. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
5. The density of the solutions depends on:
   1. pressure;
   2. provider;
   3. temperature;
   4. time elapsed since were prepared;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Punctul de echivalenta este:
   1. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   2. punctul īn care un reactiv este consumat complet īn reactie;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   4. folosit pentru a echilibra ecuatia;
   
   
2. 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 + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   
   
3. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii volumului;
   2. principiul conservarii energiei;
   3. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   4. principiul conservarii numarul de atomi pentru fiecare element;
   5. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   
   
4. Un proces redox:
   1. este īntotdeauna rapid si sigur;
   2. apare numai atunci cānd se amesteca substante gresit īn laborator;
   3. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   4. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
5. Densitatea solutiilor depinde de:
   1. presiune;
   2. furnizor;
   3. temperatura;
   4. timpul scurs de cand au fost pregatite;
   5. cantitate;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. 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 + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
2. The equivalence point is:
   1. the point in which a reactive should be added in the reaction flask;
   2. the point in which a reactive should be added in the burette;
   3. something rarely encountered in chemistry;
   4. indicated when a color change is observed into the solution;
   
   
3. In the calculations:
   1. are necessary to take the results imediatly after these are available from others;
   2. are necessary to establish the coefficients of the chemical reaction;
   3. are necessary to use some formulas expressing in different ways the concentration;
   4. are necessary to take some information from reagent bottles;
   
   
4. The density of the solutions depends on:
   1. pressure;
   2. provider;
   3. time elapsed since were prepared;
   4. temperature;
   
   
5. A redox process:
   1. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. is always fast and safe;
   3. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. involves a transfer of electrons from one atom or group of atoms to another;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. 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 + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   5. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   
   
2. Punctul de echivalenta este:
   1. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   2. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   3. ceva rar īntālnit īn chimie;
   4. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   
   
3. In calcule:
   1. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   2. este necesara stabilirea coeficientilor reactiei chimice;
   3. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   4. este necesar a se lua unele informatii de pe sticlele de reactivi;
   
   
4. Densitatea solutiilor depinde de:
   1. presiune;
   2. furnizor;
   3. timpul scurs de cand au fost pregatite;
   4. temperatura;
   5. concentratie;
   
   
5. Un proces redox:
   1. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. este īntotdeauna rapid si sigur;
   3. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The equivalence point is:
   1. the point in which a reactive should be added in the burette;
   2. the point in which a reactive is fully consumed in the reaction;
   3. indicated when a color change is observed into the solution;
   4. used to balance the equation;
   
   
2. The following chemical reactions were used in the experiments:
   1. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   
   
3. Reactions between acids and bases:
   1. have as a consequence the dissolution of a salt;
   2. always have as a consequence the formation of a quantity of water;
   3. are rarely useful, and even rarely used;
   4. have as effect the change of the color of a solution;
   
   
4. A redox process:
   1. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. is always fast and safe;
   3. occurs only when we mix wrong substances in the laboratory;
   4. involves changing of the oxidation states of some participants to the reaction;
   
   
5. Titration as a laboratory operation involves:
   1. a pH indicator that changes color depending on the pH of the solution;
   2. a volume measurement;
   3. a mass measurement;
   4. a standard or referential reactive;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Punctul de echivalenta este:
   1. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   2. punctul īn care un reactiv este consumat complet īn reactie;
   3. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   4. folosit pentru a echilibra ecuatia;
   5. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   
   
2. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   
   
3. Reactiile īntre acizi si baze:
   1. au drept consecinta dizolvarea unei sari;
   2. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   3. sunt rareori utile, si chiar mai rar utilizate;
   4. au ca efect schimbarea culorii unei solutii;
   
   
4. Un proces redox:
   1. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. este īntotdeauna rapid si sigur;
   3. apare numai atunci cānd se amesteca substante gresit īn laborator;
   4. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   
   
5. Titrarea ca o operatiune de laborator implica:
   1. un indicator de pH care īsi schimba culoarea īn functie de pH-ul solutiei;
   2. masurarea volumului;
   3. masurarea masei;
   4. un standard sau reactiv de referinta;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. We may say the followings:
   1. purification of the water may include physical processes;
   2. water is a good polar solvent;
   3. purification of the water may include labeling processes;
   4. when water contains dissolved minerals and gases is bad for drinking;
   
   
2. For a water sample following measures may be quantitatively expressed:
   1. total acidity;
   2. purity;
   3. mineral acidity;
   4. hardness;
   
   
3. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + Cl^- -> NaCl + HO^-
   2. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   
   
4. In the laboratory were analyzed:
   1. the mass of the water;
   2. the softness of the water;
   3. the hardness of the water;
   4. the concentration of the water;
   
   
5. 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. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   4. HCl + CO₃^2- -> HCO₃^- + Cl^-
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Putem spune urmatoarele:
   1. purificarea apei poate include procedee fizice;
   2. apa este un solvent polar bun;
   3. purificarea apei poate include procesele de etichetare;
   4. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   5. purificarea apei poate include procese chimice;
   
   
2. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. aciditate totala;
   2. puritate;
   3. aciditate minerala;
   4. duritate;
   5. culoare;
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + Cl^- -> NaCl + HO^-
   2. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   
   
4. Īn laborator au fost analizate:
   1. masa apei;
   2. moliciunea apei;
   3. duritatea apei;
   4. concentratia apei;
   
   
5. 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. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   4. HCl + CO₃^2- -> HCO₃^- + Cl^-
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   2. NaOH + HCOO^- -> HCOONa + HO^-
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   
   
2. EDTA is used:
   1. for indication of the equilibrium point in the reaction;
   2. for safety precautions purposes;
   3. as reagent for determining the hardness of the water;
   4. for complexing of Na¹⁺ and K¹⁺ ions;
   
   
3. We may say the followings:
   1. natural water may contain organic matter and living organisms;
   2. purification of the water may include labeling processes;
   3. water is pure only when is taken from a good freshwater mountain stream;
   4. when water contains dissolved minerals and gases is bad for drinking;
   
   
4. In the laboratory the water were:
   1. hardened using the resin column;
   2. biologically purified using the resin column;
   3. alkalinized for drinking purposes;
   4. complexed by using EDTA titrimetric method;
   
   
5. For a water sample following measures may be quantitatively expressed:
   1. hardness;
   2. total alkalinity;
   3. purity;
   4. permanent alkalinity;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + Cu²⁺ -> Cu(OH)₂ + Na⁺
   2. NaOH + HCOO^- -> HCOONa + HO^-
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   
   
2. EDTA este utilizat:
   1. pentru indicarea punctului de echilibru īn reactie;
   2. ca masura de siguranta;
   3. ca reactiv pentru determinarea duritatii apei;
   4. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   5. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   
   
3. Putem spune urmatoarele:
   1. apa naturala poate contine materie organica si organisme vii;
   2. purificarea apei poate include procesele de etichetare;
   3. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   4. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   
   
4. In laborator apa au fost:
   1. calita folosind coloana de rasina;
   2. purificata biologic utilizānd coloana de rasina;
   3. alcalinizeaza pentru baut;
   4. complexata prin metoda titrimetrica EDTA;
   5. acidulata pentru baut;
   
   
5. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. duritate;
   2. alcalinitate totala;
   3. puritate;
   4. alcalinitate permanenta;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. EDTA is used:
   1. for indication of the equilibrium point in the reaction;
   2. for safety precautions purposes;
   3. as reagent for determining the hardness of the water;
   4. for complexing of Na¹⁺ and K¹⁺ ions;
   
   
2. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   3. HCl + HO⁺ -> H₂O + Cl⁺
   4. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   
   
3. In the laboratory were analyzed:
   1. the boiling point of the water;
   2. the acidity of the water;
   3. the softness of the water;
   4. the hardness of the water;
   
   
4. For a water sample following measures may be quantitatively expressed:
   1. hardness;
   2. total alkalinity;
   3. purity;
   4. mineral acidity;
   
   
5. We may say the followings:
   1. water is a good polar solvent;
   2. purification of the water may include physical processes;
   3. natural water may contain organic matter and living organisms;
   4. purification of the water may include chemical processes;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. EDTA este utilizat:
   1. pentru indicarea punctului de echilibru īn reactie;
   2. ca masura de siguranta;
   3. ca reactiv pentru determinarea duritatii apei;
   4. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   3. HCl + HO⁺ -> H₂O + Cl⁺
   4. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   5. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   
   
3. Īn laborator au fost analizate:
   1. punctul de fierbere al apei;
   2. aciditatea apei;
   3. moliciunea apei;
   4. duritatea apei;
   5. masa apei;
   
   
4. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. duritate;
   2. alcalinitate totala;
   3. puritate;
   4. aciditate minerala;
   5. alcalinitate permanenta;
   
   
5. Putem spune urmatoarele:
   1. apa este un solvent polar bun;
   2. purificarea apei poate include procedee fizice;
   3. apa naturala poate contine materie organica si organisme vii;
   4. purificarea apei poate include procese chimice;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   3. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
2. In the laboratory were analyzed:
   1. the softness of the water;
   2. the hardness of the water;
   3. the temperature of the water;
   4. the mass of the water;
   
   
3. For a water sample following measures may be quantitatively expressed:
   1. hardness;
   2. purity;
   3. permanent alkalinity;
   4. total alkalinity;
   
   
4. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   2. NaOH + HCOO⁺ -> HCOONa + HO⁺
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   
   
5. EDTA is used:
   1. for complexing of Ca²⁺ and Mg²⁺ ions;
   2. for recharging of the resin for water softening;
   3. as reagent for determining the hardness of the water;
   4. for complexing of Na¹⁺ and K¹⁺ ions;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   3. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   
2. Īn laborator au fost analizate:
   1. moliciunea apei;
   2. duritatea apei;
   3. temperatura apei;
   4. masa apei;
   
   
3. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. duritate;
   2. puritate;
   3. alcalinitate permanenta;
   4. alcalinitate totala;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   2. NaOH + HCOO⁺ -> HCOONa + HO⁺
   3. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   4. NaOH + CO₃^2- -> HCO₃^- + HO^-
   5. NaOH + HCOO^- -> HCOONa + HO^-
   
   
5. EDTA este utilizat:
   1. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   2. pentru reīncarcarea rasinii la dedurizarea apei;
   3. ca reactiv pentru determinarea duritatii apei;
   4. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   5. pentru indicarea punctului de echilibru īn reactie;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   2. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   3. NaOH + HCOO^- -> HCOONa + HO^-
   4. NaOH + CH₃COO^- -> CH₃COONa + HO^-
   
   
2. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + HO^- -> H₂O + Cl^-
   2. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   3. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   4. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   
   
3. In the laboratory the water were:
   1. hardened using the resin column;
   2. biologically purified using the resin column;
   3. alkalinized for drinking purposes;
   4. softened using the resin column;
   
   
4. In the laboratory were analyzed:
   1. the acidity of the water;
   2. the hardness of the water;
   3. the solubility of the water;
   4. the temperature of the water;
   
   
5. We may say the followings:
   1. natural water may contain organic matter and living organisms;
   2. when water contains dissolved minerals and gases is bad for drinking;
   3. water is pure only when is taken from a good freshwater mountain stream;
   4. purification of the water may include biological processes;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CO₃^2- -> HCO₃^- + HO^-
   2. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   3. NaOH + HCOO^- -> HCOONa + HO^-
   4. NaOH + CH₃COO^- -> CH₃COONa+HO^-
   5. NaOH + HCOO⁺ -> HCOONa + HO⁺
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + HO^- -> H₂O + Cl^-
   2. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   3. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   4. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   5. HCl + HO⁺ -> H₂O + Cl⁺
   
   
3. In laborator apa au fost:
   1. calita folosind coloana de rasina;
   2. purificata biologic utilizānd coloana de rasina;
   3. alcalinizeaza pentru baut;
   4. dedurizata folosind coloana de rasina;
   5. acidulata pentru baut;
   
   
4. Īn laborator au fost analizate:
   1. aciditatea apei;
   2. duritatea apei;
   3. solubilitatea apei;
   4. temperatura apei;
   
   
5. Putem spune urmatoarele:
   1. apa naturala poate contine materie organica si organisme vii;
   2. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   3. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   4. purificarea apei poate include procese biologice;
   
   

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

1. The zinc plate:
   1. the mass 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. was corroded in sulfuric solution;
   4. the volume is measured before and after immersing it in H₂SO₄;
   
   
2. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Zn -> H₂ + Zn²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. H⁺ + Ni -> H₂ + Ni²⁺
   
   
3. The aluminum plate:
   1. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   2. was corroded in sodium hydroxide solution;
   3. the mass is measured before and after immersing it in NaOH;
   4. was degreased in sodium hydroxide solution;
   
   
4. In studied corrosion processes:
   1. a gas is released at both corrosion of zinc and aluminum;
   2. always the metal changes its oxidation state;
   3. a gas is released only the corrosion of aluminum;
   4. a gas is released only the corrosion of zinc;
   
   
5. Corrosion of metals:
   1. can be reduced by electroplating;
   2. is the destruction of metals under the action of external factors;
   3. is the protection in time to chemical agents;
   4. may provide useful raw materials for analysis;
   
   

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

1. Pentru placa de zinc:
   1. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   2. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   3. a fost corodata īn solutie sulfuric;
   4. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   
   
2. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Zn -> H₂ + Zn²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. H⁺ + Ni -> H₂ + Ni²⁺
   
   
3. Pentru placa de aluminiu:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. a fost corodata īn solutie de hidroxid de sodiu;
   3. masa este masurata īnainte si dupa imersia īn NaOH;
   4. a fost degresata īn solutie de hidroxid de sodiu;
   5. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
4. Īn procesele de coroziune studiate:
   1. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   2. īntotdeauna metalul isi schimba starea de oxidare;
   3. un gaz este eliberat numai la corodarea aluminiului;
   4. un gaz este eliberat numai la corodarea zincului;
   5. metalul isi schimba starea de oxidare pentru a deveni un cation;
   
   
5. Coroziunea metalelor:
   1. poate fi redusa prin galvanizare;
   2. este distrugerea metalelor sub actiunea factorilor externi;
   3. este protectia de durata impotriva agentilor chimici;
   4. poate furniza materii prime utile pentru analiza;
   
   

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 cation;
   2. a gas is released only the corrosion of aluminum;
   3. when a gas is released its volume depends on the amount of metal corroded;
   4. a gas is released only the corrosion of zinc;
   
   
2. Corrosion of metals:
   1. is helping in the process of cleaning the metals surfaces;
   2. is the destruction of metals under the action of external factors;
   3. can be reduced by passivation;
   4. can be reduced by electroplating;
   
   
3. 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 corroded in sulfuric solution;
   3. was involved in the gravimetric method of corrosion analysis
   4. was degreased in sulfuric acid solution;
   
   
4. The aluminum plate:
   1. was corroded in sodium hydroxide solution;
   2. was involved in the volumetric method of corrosion analysis
   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;
   
   
5. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. ZnO + CO -> Zn + CO₂
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   

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 cation;
   2. un gaz este eliberat numai la corodarea aluminiului;
   3. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   4. un gaz este eliberat numai la corodarea zincului;
   5. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   
   
2. Coroziunea metalelor:
   1. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   2. este distrugerea metalelor sub actiunea factorilor externi;
   3. poate fi redusa prin pasivare;
   4. poate fi redusa prin galvanizare;
   5. este protectia de durata impotriva agentilor chimici;
   
   
3. Pentru placa de zinc:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. a fost corodata īn solutie sulfuric;
   3. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   4. a fost degresata īn solutie de acid sulfuric;
   
   
4. Pentru placa de aluminiu:
   1. a fost corodata īn solutie de hidroxid de sodiu;
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   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;
   5. masa este masurata īnainte si dupa imersia īn NaOH;
   
   
5. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. ZnO + CO -> Zn + CO₂
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   

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

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

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

1. Īn procesele de coroziune studiate:
   1. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. metalul isi schimba starea de oxidare pentru a deveni un cation;
   4. un gaz este eliberat numai la corodarea zincului;
   
   
2. Pentru placa de aluminiu:
   1. volumul se masoara īnainte si dupa imersia īn NaOH;
   2. a fost corodata īn solutie de hidroxid de sodiu;
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. masa este masurata īnainte si dupa imersia īn NaOH;
   
   
3. Pentru placa de zinc:
   1. a fost degresata īn solutie de acid sulfuric;
   2. volumul 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. Coroziunea metalelor:
   1. are loc pur si simplu prin expunerea la umiditate īn aer;
   2. poate furniza materii prime utile pentru analiza;
   3. este protectia de durata impotriva agentilor chimici;
   4. poate fi redusa prin pasivare;
   
   
5. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. Fe₂O₃ + CO -> Fe + CO₂
   4. H⁺ + Ni -> H₂ + Ni²⁺
   5. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   

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

1. The zinc plate:
   1. was involved in the gravimetric method of corrosion analysis
   2. the volume is measured before and after immersing it in H₂SO₄;
   3. was involved in the volumetric method of corrosion analysis
   4. was degreased in sulfuric acid solution;
   
   
2. Which of the following reactions may be called as of corrosion:
   1. Fe₂O₃ + CO -> Fe + CO₂
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
3. Corrosion of metals:
   1. is the protection in time to chemical agents;
   2. is the destruction of metals under the action of external factors;
   3. is a beneficial process that shows the stability of metals;
   4. may provide useful raw materials for analysis;
   
   
4. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an cation;
   2. the metal it changes its oxidation state becoming an anion;
   3. when a gas is released its volume depends on the amount of metal corroded;
   4. a gas is released only the corrosion of aluminum;
   
   
5. The aluminum plate:
   1. the mass is measured before and after immersing it in NaOH;
   2. the surface is measured before and after immersing it in NaOH;
   3. was degreased in sodium hydroxide solution;
   4. was involved in the volumetric method of corrosion analysis
   
   

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

1. Pentru placa de zinc:
   1. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   2. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. a fost degresata īn solutie de acid sulfuric;
   5. a fost corodata īn solutie sulfuric;
   
   
2. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. Fe₂O₃ + CO -> Fe + CO₂
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   4. Al₂O₃ + NaOH -> NaAlO₂
   5. H⁺ + Ni -> H₂ + Ni²⁺
   
   
3. Coroziunea metalelor:
   1. este protectia de durata impotriva agentilor chimici;
   2. este distrugerea metalelor sub actiunea factorilor externi;
   3. este un proces benefic care arata stabilitatea metalelor;
   4. poate furniza materii prime utile pentru analiza;
   5. poate fi redusa prin pasivare;
   
   
4. Īn procesele de coroziune studiate:
   1. metalul isi schimba starea de oxidare pentru a deveni un cation;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   4. un gaz este eliberat numai la corodarea aluminiului;
   5. un gaz este eliberat numai la corodarea zincului;
   
   
5. Pentru placa de aluminiu:
   1. masa este masurata īnainte si dupa imersia īn NaOH;
   2. suprafata se masoara īnainte si dupa imersia īn NaOH;
   3. a fost degresata īn solutie de hidroxid de sodiu;
   4. a fost implicata īn metoda volumetrica de analiza a coroziunii
   5. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   

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

1. Which of the following reactions may be called as of corrosion:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   
2. In studied corrosion processes:
   1. a gas is released at both corrosion of zinc and aluminum;
   2. the metal it changes its oxidation state becoming an anion;
   3. a gas is released only the corrosion of aluminum;
   4. a gas is released only the corrosion of zinc;
   
   
3. Corrosion of metals:
   1. can be reduced by passivation;
   2. is the destruction of metals under the action of external factors;
   3. can be reduced by electroplating;
   4. is helping in the process of cleaning the metals surfaces;
   
   
4. The zinc plate:
   1. the mass is measured before and after immersing it in H₂SO₄;
   2. was involved in the gravimetric method of corrosion analysis
   3. was corroded in sulfuric solution;
   4. was degreased in sulfuric acid solution;
   
   
5. The aluminum plate:
   1. was involved in the gravimetric method of corrosion analysis
   2. was involved in the volumetric method of corrosion analysis
   3. was corroded in sodium hydroxide solution;
   4. the mass is measured before and after immersing it in NaOH;
   
   

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

1. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   
2. Īn procesele de coroziune studiate:
   1. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. un gaz este eliberat numai la corodarea aluminiului;
   4. un gaz este eliberat numai la corodarea zincului;
   
   
3. Coroziunea metalelor:
   1. poate fi redusa prin pasivare;
   2. este distrugerea metalelor sub actiunea factorilor externi;
   3. poate fi redusa prin galvanizare;
   4. este de ajutor īn procesul de curatare a suprafetelor metalelor;
   
   
4. Pentru placa de zinc:
   1. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. a fost corodata īn solutie sulfuric;
   4. a fost degresata īn solutie de acid sulfuric;
   5. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
5. Pentru placa de aluminiu:
   1. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. a fost corodata īn solutie de hidroxid de sodiu;
   4. masa este masurata īnainte si dupa imersia īn NaOH;
   
   

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

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. 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. it depends on the surface of the sample;
   4. is to be calculated after conducting the experiment;
   
   
2. Electrical conductivity of nickel salts solutions:
   1. is improved by salts additions;
   2. is relatively small;
   3. is relatively high;
   4. is reduced by salts additions;
   
   
3. Theoretical mass of nickel deposited is calculated using:
   1. the conservation of the energy law;
   2. perfect gas law;
   3. solutions laws;
   4. the electrolysis law;
   
   
4. At the nickel plating following reactions took place:
   1. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   2. at high densities of current oxygen anions (O^2-) have the tendency to discharge at the anode: O^2- - 2e^- -> O₂⁰
   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
   
   
5. It is expected to have a mass of nickel deposited:
   1. proportional with the surface of the sample;
   2. proportional with the intensity of the current used;
   3. inversely proportional with the nickel plating time;
   4. inversely proportional with the surface of the sample;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. Theoretical mass of nickel deposited is calculated using:
   1. perfect gas law;
   2. the conservation of the energy law;
   3. solutions laws;
   4. the conservation of the number of atoms for each element law;
   
   
2. Electrical conductivity of nickel salts solutions:
   1. is relatively high;
   2. is relatively small;
   3. depends on the intensity of the current used;
   4. is improved by salts additions;
   
   
3. It is expected to have a mass of nickel deposited:
   1. higher than the calculated theoretical one;
   2. much higher than the calculated theoretical one;
   3. proportional with the surface of the sample;
   4. much lower than the calculated theoretical one;
   
   
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 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 anode: O^2- - 2e^- -> O₂⁰
   
   
5. The intensity of the current:
   1. affect only the quality of the nickel deposition;
   2. is to be calculated after conducting the experiment;
   3. does not affect the quality nor the quantity of the nickel deposition;
   4. should be adjusted by the technicians, we have nothing to do there;
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea gazelor perfecte;
   2. legea conservarii energiei;
   3. legea solutilor;
   4. conservarea numarului de atomi pentru fiecare element;
   5. legea actiunii maselor;
   
   
2. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este relativ mare;
   2. este relativ mica;
   3. depinde de intensitatea curentului utilizat;
   4. este īmbunatatita prin adaosuri de saruri;
   5. este redusa prin adaosuri de saruri;
   
   
3. Este de asteptat ca masa de nichel depus sa fie:
   1. mai mare decāt cea teoretica calculata;
   2. mult mai mare decāt cea teoretica calculata;
   3. proportionala cu suprafata probei;
   4. mult mai mica decāt cea teoretica calculata;
   
   
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 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 anod: O^2- - 2e^- -> O₂⁰
   5. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰
   
   
5. Intensitatea curentului:
   1. afecteaza numai calitatea depunerii nichelului;
   2. se calculeaza dupa efectuarea experimentului;
   3. nu afecteaza calitatea nici cantitatea nichelului depus;
   4. ar trebui sa fie ajustata de catre tehnicieni, nu avem nimic de a face acolo;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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