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

1. We may say the followings:
   1. diffusion process appears in all gaseous, liquid and solid states;
   2. diffusion process appears only in gaseous state;
   3. the kinetic energy of a molecule is affected by temperature and pressure;
   4. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   
   
2. 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. are considered to be at the same temperature, but may have different energies;
   
   
3. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory and our breathing;
   2. formation of ammonium chloride;
   3. our experiment designed to trap the product of the reaction;
   4. presence of the ammonia;
   
   
4. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the speeds ratio;
   2. measuring of the diffusion time;
   3. synchronization of the diffusion times;
   4. extracting the information necessary to calculate the diffusion coefficients;
   
   
5. At the ends of the tube following equilibrium reactions occurs:
   1. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   3. H₂O \=\ H⁺ + HO^-
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   

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

1. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. proces de difuzie apare īn toate starile gazoasa, lichida si solida;
   2. proces de difuzie apare numai īn stare gazoasa;
   3. energia cinetica a unei molecule este afectata de temperatura si presiune;
   4. energia cinetica a unei molecule este afectata de temperatura, presiune si dimensiunea moleculei;
   
   
2. 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. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   5. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   
   
3. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   2. formarea clorurii de amoniu;
   3. experimentului nostru proiectat pentru a captura produsul de reactie;
   4. prezentei amoniacului;
   5. prezentei clorului;
   
   
4. Cronometrul este utilizat īn experimentul pentru:
   1. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   2. masurarea timpului de difuzie;
   3. sincronizarea timpilor de difuzie;
   4. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   
   
5. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   3. H₂O \=\ H⁺ + HO^-
   4. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   

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

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

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

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

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 are moving in the same direction;
   2. all have same energy;
   3. are considered to be at the same temperature, but may have different speeds;
   4. are considered to be at the same temperature, but may have different energies;
   
   
2. The position of the ring in the experiment is dependent on:
   1. the width of the tube and not of the length of the tube;
   2. the virtual speeds and not the real speeds of each involved species;
   3. the real speeds and not the virtual speeds of each involved species;
   4. the propagation of the species as ions and not as neutral molecules;
   
   
3. The time to the formation of the ring in the experiment is dependent on:
   1. the real speeds and not the virtual speeds of each involved species;
   2. the length of the tube and the width of the tube;
   3. the length of the tube and not of the width of the tube;
   4. the concentrations of the solutions used;
   
   
4. The chronometer is used in the experiment for:
   1. extracting the information necessary to calculate the diffusion coefficients;
   2. indication of the moment when we should pay attention to the experiment;
   3. synchronization of the diffusion times;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
5. At the ends of the tube following equilibrium reactions occurs:
   1. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. H⁺ + HO^- \=\ H₂O
   3. HCl + H₂O \=\ Cl^- + H₃O⁺
   4. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   
   

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 se deplaseaza īn aceeasi directie;
   2. toate au aceeasi energie;
   3. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   4. sunt considerate a fi la aceeasi temperatura, dar pot avea diferite energii;
   5. toate au aceeasi viteza;
   
   
2. Pozitia inelului īn experimentul este dependenta de:
   1. latimea tubului si nu lungimea tubului;
   2. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   3. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   4. propagarea speciilor ca ionii si nu ca si molecule neutre;
   
   
3. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   2. lungimea tubului si latimea tubului;
   3. lungimea tubului si nu latimea tubului;
   4. concentratiile solutiilor utilizate;
   5. propagarea speciilor ca ionii si nu ca si molecule neutre;
   
   
4. Cronometrul este utilizat īn experimentul pentru:
   1. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   2. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   3. sincronizarea timpilor de difuzie;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   
   
5. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₄⁺ + Cl^- \=\ NH₄Cl
   2. H⁺ + HO^- \=\ H₂O
   3. HCl + H₂O \=\ Cl^- + H₃O⁺
   4. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   
   

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

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

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

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 average energy or average speed of each involved species;
   2. the mode energy or mode speed of each involved species;
   3. the propagation of the species as ions and not as neutral molecules;
   4. the real speeds and not the virtual speeds of each involved species;
   
   
2. The position of the ring in the experiment is dependent on:
   1. the mode energy or mode speed of each involved species;
   2. the length of the tube and the width of the tube;
   3. the propagation of the species as neutral molecules and not as ions;
   4. the propagation of the species as ions and not as neutral molecules;
   
   
3. As you concluded from the experiment, the molecules of a gas at equilibrium:
   1. all are moving in the same direction;
   2. are considered to be at the same temperature, but may have different speeds;
   3. all have same energy;
   4. all are moving in an arbitrary direction;
   
   
4. At the ends of the tube following equilibrium reactions occurs:
   1. HCl + H₂O \=\ Cl^- + H₃O⁺
   2. NH₃ + HCl \=\ NH₄Cl
   3. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   4. H₂O \=\ H⁺ + HO^-
   
   
5. 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;
   
   

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. energia medie sau viteza medie a fiecarei specii implicate;
   2. viteza la moda sau energia la moda a fiecarei specii implicate;
   3. propagarea speciilor ca ionii si nu ca si molecule neutre;
   4. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   
   
2. Pozitia inelului īn experimentul este dependenta de:
   1. viteza la moda sau energia la moda a fiecarei specii implicate;
   2. lungimea tubului si latimea tubului;
   3. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   4. propagarea speciilor ca ionii si nu ca si molecule neutre;
   
   
3. Asa cum s-a concluzionat din experiment, moleculele unui gaz la echilibru:
   1. toate se deplaseaza īn aceeasi directie;
   2. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   3. toate au aceeasi energie;
   4. toate se īndreapta īntr-o directie arbitrara;
   
   
4. La capetele tubului urmatoarele reactii de echilibru apar:
   1. HCl + H₂O \=\ Cl^- + H₃O⁺
   2. NH₃ + HCl \=\ NH₄Cl
   3. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   4. H₂O \=\ H⁺ + HO^-
   5. H⁺ + HO^- \=\ H₂O
   
   
5. 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;
   5. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   
   

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

1. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O₂ -> H₂O + O₂;
   2. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   3. KNO₃ -> KNO₂ + O₂;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   
2. A state equation for a real gas is:
   1. a relation which is always true, independent of the values of the state parameters;
   2. a relation which takes into account certain deviations from the ideal model;
   3. usable in the laboratory, but is not to be used somewhere else;
   4. a relation derived to approximate the relation between state parameters;
   
   
3. In the laboratory were studied:
   1. increasing of the temperature of a solid mass when was heated;
   2. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   3. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₂;
   4. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   
   
4. 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 much lower than in liquid state;
   4. we need to take supplementary precautions in the laboratory;
   
   
5. The values taken from the experiment conducted in the laboratory indicated that:
   1. oxigen were released as result of the decomposition;
   2. we possess enough information to decide what gas was released from the reaction;
   3. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   4. ozone were released as result of the decomposition;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O₂ -> H₂O + O₂;
   2. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   3. KNO₃ -> KNO₂ + O₂;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   
2. O ecuatie de stare pentru un gaz real este:
   1. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   2. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   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. o relatie care poate implica unele constante dependente de compozitia gazului;
   
   
3. Īn laborator s-au studiat:
   1. cresterea temperaturii unei mase solide cānd s-a īncalzit;
   2. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   3. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   
   
4. 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 mult mai mica decāt īn stare lichida;
   4. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   
   
5. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. oxigenul au fost eliberat ca urmare a descompunerii;
   2. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   3. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   4. ozonul au fost eliberat ca urmare a descompunerii;
   5. aer a fost eliberat ca urmare a descompunerii;
   
   

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

1. For gaseous state:
   1. the pressure is unchanged when a chemical reaction occurs;
   2. it exists an equation for all, p · V = n · R · T;
   3. the pressure is much higher than in liquid state;
   4. the pressure is approximately the same as in liquid state;
   
   
2. The values taken from the experiment conducted in the laboratory indicated that:
   1. ozone were released as result of the decomposition;
   2. we do not possess enough information to decide what gas was released from the reaction;
   3. as more complex the model is used to approximate the behavior, as best agreement is obtained;
   4. oxigen were released as result of the decomposition;
   
   
3. A state equation for a real gas is:
   1. a relation derived to approximate the relation between state parameters;
   2. a relation which is always true, independent of the values of the state parameters;
   3. a relation which may involve some constants dependent of gas composition;
   4. a relation between an certain number of state parameters;
   
   
4. In the laboratory were studied:
   1. the lost of the mass of a solid as result of producing of some gas;
   2. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   3. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   4. the producing of some gas as result of a lost of the mass of a solid;
   
   
5. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   2. KClO₃ -> KCl + O₂;
   3. distillation of the liquid air;
   4. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pentru stare gazoasa:
   1. presiunea este neschimbata cānd apare o reactie chimica;
   2. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   3. presiunea este mult mai mare decāt īn stare lichida;
   4. presiunea este aproximativ aceeasi ca si īn stare lichida;
   
   
2. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. ozonul au fost eliberat ca urmare a descompunerii;
   2. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   3. cu cat mai complex este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   4. oxigenul au fost eliberat ca urmare a descompunerii;
   5. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
3. O ecuatie de stare pentru un gaz real este:
   1. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   2. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   3. o relatie care poate implica unele constante dependente de compozitia gazului;
   4. o relatie īntre un anumit numar de parametri de stare;
   
   
4. Īn laborator s-au studiat:
   1. pierdut din masa de solid ca urmare a producerii unor gaze;
   2. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   3. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   4. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   
   
5. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   2. KClO₃ -> KCl + O₂;
   3. distilarea aerului lichid;
   4. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   5. KCl + O₂ -> KClO₃;
   
   

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. KClO₃ -> KCl + O₂;
   2. KNO₂ + O₂ -> KNO₃;
   3. H₂O + O₂ -> H₂O₂;
   4. distillation of the liquid air;
   
   
2. In the laboratory were studied:
   1. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   2. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   3. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   4. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   
   
3. For gaseous state:
   1. it exists an equation for all, p · V = n · R · T;
   2. the pressure is approximately the same as in liquid state;
   3. the pressure is much higher than in liquid state;
   4. we need to take supplementary precautions in the laboratory;
   
   
4. A state equation for a real gas is:
   1. a relation obtained after conducting of the experiment;
   2. a relation between an unlimited number of state parameters;
   3. a relation which may involve some constants dependent of gas composition;
   4. a relation between an certain number of state parameters;
   
   
5. The values taken from the experiment conducted in the laboratory indicated that:
   1. the ideal model of a gas approximated the worst the behavior of the released gas;
   2. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   3. we possess enough information to decide what gas was released from the reaction;
   4. oxigen were released as result of the decomposition;
   
   

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. KClO₃ -> KCl + O₂;
   2. KNO₂ + O₂ -> KNO₃;
   3. H₂O + O₂ -> H₂O₂;
   4. distilarea aerului lichid;
   5. Ag + O₂ -> Ag₂O;
   
   
2. Īn laborator s-au studiat:
   1. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   2. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   3. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd oxigenul este eliberat;
   5. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   
   
3. Pentru stare gazoasa:
   1. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   2. presiunea este aproximativ aceeasi ca si īn stare lichida;
   3. presiunea este mult mai mare decāt īn stare lichida;
   4. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   
   
4. O ecuatie de stare pentru un gaz real este:
   1. o relatie obtinut dupa efectuarea experimentului;
   2. o relatie īntre un numar nelimitat de parametri de stare;
   3. o relatie care poate implica unele constante dependente de compozitia gazului;
   4. o relatie īntre un anumit numar de parametri de stare;
   5. o relatie care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   
   
5. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   2. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   4. oxigenul au fost eliberat ca urmare a descompunerii;
   5. 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. we do not possess enough information to decide what gas was released from the reaction;
   2. the ideal model of a gas approximated the worst the behavior of the released gas;
   3. ozone were released as result of the decomposition;
   4. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   
   
2. A state equation for a real gas is:
   1. a relation obtained after conducting of the experiment;
   2. usable in the laboratory, but is not to be used somewhere else;
   3. a relation between an certain number of state parameters;
   4. a relation between an unlimited number of state parameters;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   2. KClO₃ -> KCl + O₂;
   3. distillation of the liquid air;
   4. KNO₂ + O₂ -> KNO₃;
   
   
4. For gaseous state:
   1. the pressure is exactly the same as in liquid state;
   2. the pressure depends on the model which are used to approximate it;
   3. the pressure is subject to change when a chemical reaction occurs;
   4. the pressure is much higher than in liquid state;
   
   
5. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   2. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   3. the producing of some gas as result of a lost of the mass of a solid;
   4. decomposition of the potasium chloride to potasium chlorate when oxygen is released;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. 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. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   3. ozonul au fost eliberat ca urmare a descompunerii;
   4. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   
   
2. O ecuatie de stare pentru un gaz real este:
   1. o relatie obtinut dupa efectuarea experimentului;
   2. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   3. o relatie īntre un anumit numar de parametri de stare;
   4. o relatie īntre un numar nelimitat de parametri de stare;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   2. KClO₃ -> KCl + O₂;
   3. distilarea aerului lichid;
   4. KNO₂ + O₂ -> KNO₃;
   
   
4. Pentru stare gazoasa:
   1. presiunea este exact la fel ca si īn stare lichida;
   2. presiunea depinde de modelul care este utilizat pentru o aproxima;
   3. presiunea se pot modifica atunci cānd apare o reactie chimica;
   4. presiunea este mult mai mare decāt īn stare lichida;
   5. presiunea este neschimbata cānd apare o reactie chimica;
   
   
5. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   2. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   3. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   4. 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. 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. the ideal model of a gas approximated the worst the behavior of the released gas;
   3. air were released as result of the decomposition;
   4. we possess enough information to decide what gas was released from the reaction;
   
   
2. In the laboratory were studied:
   1. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   2. the lost of the mass of a solid as result of producing of some gas;
   3. increasing of the pressure of a gas when was heated;
   4. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KNO₃ -> KNO₂ + O₂;
   2. Ag + O₂ -> Ag₂O;
   3. Ag₂O -> Ag + O₂;
   4. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   
   
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 which is always true, independent of the values of the state parameters;
   4. a relation which may involve some constants dependent of gas composition;
   
   
5. For gaseous state:
   1. the pressure is much higher than in liquid state;
   2. it exists an equation for all, p · V = n · R · T;
   3. we need to take supplementary precautions in the laboratory;
   4. the pressure is much lower than in liquid state;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   2. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   3. aer a fost eliberat ca urmare a descompunerii;
   4. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   
2. Īn laborator s-au studiat:
   1. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   2. pierdut din masa de solid ca urmare a producerii unor gaze;
   3. cresterea presiunii unui gaz cānd s-a īncalzit;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   5. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KNO₃ -> KNO₂ + O₂;
   2. Ag + O₂ -> Ag₂O;
   3. Ag₂O -> Ag + O₂;
   4. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   5. KClO₃ -> KCl + O₂;
   
   
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 care este īntotdeauna adevarata, independent de valorile parametrilor de stare;
   4. o relatie care poate implica unele constante dependente de compozitia gazului;
   5. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   
   
5. Pentru stare gazoasa:
   1. presiunea este mult mai mare decāt īn stare lichida;
   2. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   3. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   4. presiunea este mult mai mica decāt īn stare lichida;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. dependent on the intensity of the current applied to the electrograf and composition of the metal alloy;
   4. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   
   
2. The paper requires before analysis of the sample:
   1. to be burned;
   2. to be tested;
   3. to be weighted;
   4. to be cut in small pieces;
   
   
3. When lead is identified:
   1. a yellow complex appears;
   2. a violet complex appears;
   3. dangerous substances are used;
   4. precautions should be made for toxic wastes disposal;
   
   
4. This method of analysis of metals and alloys is:
   1. a nondestructive method of analysis;
   2. useful for pure metals, not so useful for alloys;
   3. a gravimetric method of analysis;
   4. useful for alloys, not so useful for metals;
   
   
5. Why moisten the paper with solution of sodium nitrate?
   1. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   2. to have something to do in the laboratory;
   3. for stopping after a while the chemical reaction that takes place;
   4. to provide cations for analysis;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   4. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   5. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
2. Hartia necesita ca īnainte de analiza probei:
   1. sa fie arsa;
   2. sa fie testata;
   3. sa fie cantarita;
   4. sa fie taiata īn bucati mici;
   5. sa i se masoare suprafata;
   
   
3. Cānd plumbul este identificat:
   1. apare un complex galben;
   2. apare un complex violet;
   3. sunt utilizate substante periculoase;
   4. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   
   
4. Aceasta metoda de analiza de metale si aliaje este:
   1. o metoda nedistructiva de analiza;
   2. utila pentru metale pure, nu atāt de utila pentru aliaje;
   3. o metoda gravimetrica de analiza;
   4. utila pentru aliaje, nu atāt de utila pentru metale;
   
   
5. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   2. pentru a avea ceva de a face īn laborator;
   3. pentru oprirea dupa un timp reactiei chimice care are loc;
   4. pentru furniza cationi pentru analiza;
   5. pentru ca hartia sa actioneze ca izolator;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. Why moisten the paper with solution of sodium nitrate?
   1. to provide cations for analysis;
   2. to be cut easily with scissors;
   3. to accomodate ourselves to use chemicals;
   4. to have something to do in the laboratory;
   
   
2. When lead is identified:
   1. the reactions used clearly indicates its presence;
   2. a violet complex appears;
   3. a red-brown complex appears;
   4. dangerous substances are used;
   
   
3. When the electrical circuit is closed:
   1. electric current avoids the sample and the paper;
   2. anions 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 metals are passed into solution as cations;
   
   
4. The electric charges after passing the metals into solution may be:
   1. dependent on the intensity of the current applied to the electrograf and composition of the metal alloy;
   2. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   
   
5. When aluminum is identified:
   1. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   2. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   3. the presence of other ions may produce a true positive outcome;
   4. the presence of other ions may produce a true negative outcome;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru furniza cationi pentru analiza;
   2. sa fie taiat cu usurinta cu foarfeca;
   3. sa ne acomodam in a utiliza substante chimice;
   4. pentru a avea ceva de a face īn laborator;
   5. pentru ca hartia sa actioneze ca izolator;
   
   
2. Cānd plumbul este identificat:
   1. reactiile utilizate īn mod clar ii indica prezenta;
   2. apare un complex violet;
   3. apare un complex rosu-brun;
   4. sunt utilizate substante periculoase;
   
   
3. Cānd circuitul electric este īnchis:
   1. curent electric evita proba si hārtia;
   2. anionii din solutie sunt trecuti īn proba ca metale;
   3. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   4. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   
   
4. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. dependente de intensitatea curentului aplicat la electrograf si compozitia aliajului metalic;
   2. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   5. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   
   
5. Cānd aluminiu este identificat:
   1. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   2. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   3. prezenta altor ioni poate produce un rezultat adevarat pozitiv;
   4. prezenta altor ioni poate produce un rezultat adevarat negativ;
   5. doar o reactie de identificare este posibila;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. Why moisten the paper with solution of sodium nitrate?
   1. to be cut easily with scissors;
   2. to work as an electrolyte and to allow passing of the electrical current through moistened paper;
   3. to provide cations for analysis;
   4. to accomodate ourselves to use chemicals;
   
   
2. When aluminum is identified:
   1. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   2. only one identification reaction is possible;
   3. the presence of other ions may produce a false positive outcome;
   4. using of alizarin along with ammonium hidroxide provide a red colored complex;
   
   
3. This method of analysis of metals and alloys is:
   1. a nondestructive method of analysis;
   2. useful for both metals and alloys;
   3. a destructive method of analysis;
   4. not useful for both metals and alloys;
   
   
4. When lead is identified:
   1. a red-brown complex appears;
   2. precautions should be made for toxic wastes disposal;
   3. dangerous substances are used;
   4. a heat release is observed;
   
   
5. The paper requires before analysis of the sample:
   1. to be weighted;
   2. to be cut in small pieces;
   3. to measure its surface;
   4. to be acidified;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. sa fie taiat cu usurinta cu foarfeca;
   2. pentru a lucra ca un electrolit si pentru a permite trecerea de curent electric prin hārtia umezita;
   3. pentru furniza cationi pentru analiza;
   4. sa ne acomodam in a utiliza substante chimice;
   5. pentru oprirea dupa un timp reactiei chimice care are loc;
   
   
2. Cānd aluminiu este identificat:
   1. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   2. doar o reactie de identificare este posibila;
   3. prezenta altor ioni poate produce un rezultat fals pozitiv;
   4. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   5. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   
   
3. Aceasta metoda de analiza de metale si aliaje este:
   1. o metoda nedistructiva de analiza;
   2. utila atāt pentru metale si aliaje;
   3. o metoda distructiva de analiza;
   4. nu este utila nici pentru metale nici pentru aliaje;
   
   
4. Cānd plumbul este identificat:
   1. apare un complex rosu-brun;
   2. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   3. sunt utilizate substante periculoase;
   4. se observa o eliberare de caldura;
   
   
5. Hartia necesita ca īnainte de analiza probei:
   1. sa fie cantarita;
   2. sa fie taiata īn bucati mici;
   3. sa i se masoare suprafata;
   4. sa fie acidulata;
   5. sa fie arsa;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. This method of analysis of metals and alloys is:
   1. useful for pure metals, not so useful for alloys;
   2. too ancient to be used today in the laboratory;
   3. useful for alloys, not so useful for metals;
   4. a quantitative method of analysis;
   
   
2. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
3. Why moisten the paper with solution of sodium nitrate?
   1. to provide cations for analysis;
   2. to accomodate ourselves to use chemicals;
   3. to have something to do in the laboratory;
   4. to be cut easily with scissors;
   
   
4. When aluminum is identified:
   1. is identified as Al³⁺ cation;
   2. is identified as Al¹⁺ cation;
   3. only one identification reaction is possible;
   4. is identified as Al²⁺ cation;
   
   
5. The paper requires before analysis of the sample:
   1. to be burned;
   2. to measure its surface;
   3. to be moistened with an electrolyte;
   4. to be acidified;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Aceasta metoda de analiza de metale si aliaje este:
   1. utila pentru metale pure, nu atāt de utila pentru aliaje;
   2. prea veche pentru a fi utilizata īn prezent īn laborator;
   3. utila pentru aliaje, nu atāt de utila pentru metale;
   4. o metoda cantitativa de analiza;
   5. nu este utila nici pentru metale nici pentru aliaje;
   
   
2. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   
   
3. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru furniza cationi pentru analiza;
   2. sa ne acomodam in a utiliza substante chimice;
   3. pentru a avea ceva de a face īn laborator;
   4. sa fie taiat cu usurinta cu foarfeca;
   5. pentru ca hartia sa actioneze ca izolator;
   
   
4. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al³⁺;
   2. este identificat ca cationul Al¹⁺;
   3. doar o reactie de identificare este posibila;
   4. este identificat ca cationul Al²⁺;
   
   
5. Hartia necesita ca īnainte de analiza probei:
   1. sa fie arsa;
   2. sa i se masoare suprafata;
   3. sa fie umezita cu un electrolit;
   4. sa fie acidulata;
   5. sa fie taiata īn bucati mici;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When the electrical circuit is closed:
   1. electric current passes the sample and the paper;
   2. anions from the solution are passed into sample as metals;
   3. surface of the sample is fastly covered by a protecting shield of electrons;
   4. cations from the solution are passed into sample as metals;
   
   
2. The paper requires before analysis of the sample:
   1. to be tested;
   2. to be moistened with an electrolyte;
   3. to measure its surface;
   4. to be dry;
   
   
3. This method of analysis of metals and alloys is:
   1. useful for pure metals, not so useful for alloys;
   2. too ancient to be used today in the laboratory;
   3. useful for alloys, not so useful for metals;
   4. a nondestructive method of analysis;
   
   
4. When aluminum is identified:
   1. the presence of other ions may produce a false positive outcome;
   2. there are many identification reactions possible;
   3. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   4. is identified as Al¹⁺ cation;
   
   
5. Why moisten the paper with solution of sodium nitrate?
   1. to provide cations for analysis;
   2. to accomodate ourselves to use chemicals;
   3. to be cut easily with scissors;
   4. for the paper to work as isolator;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd circuitul electric este īnchis:
   1. curent electric trece prin proba si hārtie;
   2. anionii din solutie sunt trecuti īn proba ca metale;
   3. suprafata probei este cu rapiditate acoperita de un strat protector de electroni;
   4. cationii din solutie sunt trecuti īn proba ca metale;
   5. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   
   
2. Hartia necesita ca īnainte de analiza probei:
   1. sa fie testata;
   2. sa fie umezita cu un electrolit;
   3. sa i se masoare suprafata;
   4. sa fie uscata;
   
   
3. Aceasta metoda de analiza de metale si aliaje este:
   1. utila pentru metale pure, nu atāt de utila pentru aliaje;
   2. prea veche pentru a fi utilizata īn prezent īn laborator;
   3. utila pentru aliaje, nu atāt de utila pentru metale;
   4. o metoda nedistructiva de analiza;
   
   
4. Cānd aluminiu este identificat:
   1. prezenta altor ioni poate produce un rezultat fals pozitiv;
   2. exista multe reactii posibile de identificare;
   3. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   4. este identificat ca cationul Al¹⁺;
   5. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   
   
5. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru furniza cationi pentru analiza;
   2. sa ne acomodam in a utiliza substante chimice;
   3. sa fie taiat cu usurinta cu foarfeca;
   4. pentru ca hartia sa actioneze ca izolator;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The indicator should be added:
   1. only at the suggestion of the supervisor;
   2. in small quantities, to avoid the errors in observations and in calculations;
   3. to provide a color change at equivalence point;
   4. only in special cases, when the burette is graded from its bottom to its top;
   
   
2. 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 liquid in the burette should be at the same level before and after conducting the experiment;
   
   
3. A redox process:
   1. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   2. involves changing of the aggregation states of some participants to the reaction;
   3. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. is always fast and safe;
   
   
4. Reactions between acids and bases:
   1. always have as a consequence the formation of a quantity of water;
   2. are all exothermic, being therefore dangerous outside of the laboratory;
   3. are always fast, taking place almost instantaneously;
   4. are rarely useful, and even rarely used;
   
   
5. The equivalence point is:
   1. the point in which a reactive should be added in the reaction flask;
   2. used to balance the equation;
   3. the point in which a reactive is fully consumed in the reaction;
   4. the point in which a reactive should be added in the burette;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Trebuie adaugat indicatorul:
   1. numai la sugestia supraveghetorului;
   2. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   3. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   4. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   5. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   
   
2. 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. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   
   
3. Un proces redox:
   1. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   2. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   3. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   4. este īntotdeauna rapid si sigur;
   
   
4. Reactiile īntre acizi si baze:
   1. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   2. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   3. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   4. sunt rareori utile, si chiar mai rar utilizate;
   5. au ca efect schimbarea culorii unei solutii;
   
   
5. Punctul de echivalenta este:
   1. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   2. folosit pentru a echilibra ecuatia;
   3. punctul īn care un reactiv este consumat complet īn reactie;
   4. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. Reactions between acids and bases:
   1. have as effect the change of the color of a solution;
   2. are all exothermic, being therefore dangerous outside of the laboratory;
   3. are always fast, taking place almost instantaneously;
   4. are rarely useful, and even rarely used;
   
   
2. A redox process:
   1. is always fast and safe;
   2. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. occurs only when we mix wrong substances in the laboratory;
   
   
3. Titration as a laboratory operation involves:
   1. a standard or referential reactive;
   2. a burette;
   3. a volume measurement;
   4. a sulphuric acid solution;
   
   
4. The following chemical reactions were used in the experiments:
   1. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. H₂O + CO₂ -> H₂CO₃
   
   
5. The indicator should be added:
   1. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   2. in small quantities, to avoid the errors in observations and in calculations;
   3. only at the suggestion of the supervisor;
   4. to provide a color change at equivalence point;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Reactiile īntre acizi si baze:
   1. au ca efect schimbarea culorii unei solutii;
   2. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   3. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   4. sunt rareori utile, si chiar mai rar utilizate;
   
   
2. Un proces redox:
   1. este īntotdeauna rapid si sigur;
   2. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   3. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. apare numai atunci cānd se amesteca substante gresit īn laborator;
   5. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
3. Titrarea ca o operatiune de laborator implica:
   1. un standard sau reactiv de referinta;
   2. o biureta;
   3. masurarea volumului;
   4. o solutie de acid sulfuric;
   
   
4. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   3. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. H₂O + CO₂ -> H₂CO₃
   5. (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   
5. Trebuie adaugat indicatorul:
   1. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   2. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   3. numai la sugestia supraveghetorului;
   4. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The equivalence point is:
   1. something rarely encountered in chemistry;
   2. indicated when a color change is observed into the solution;
   3. used to balance the equation;
   4. the point in which a reactive is fully consumed in the reaction;
   
   
2. The density of the solutions depends on:
   1. pressure;
   2. quantity;
   3. concentration;
   4. temperature;
   
   
3. 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
   
   
4. Titration as a laboratory operation involves:
   1. a standard or referential reactive;
   2. a pH indicator that changes color depending on the pH of the solution;
   3. a burette;
   4. a pH-metter;
   
   
5. The indicator should be added:
   1. to indicate our safety limits when we dealt with chemicals;
   2. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   3. in large quantities, according to the principle 'only size matters';
   4. only in special cases, when the burette is graded from its bottom to its top;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Punctul de echivalenta este:
   1. ceva rar īntālnit īn chimie;
   2. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   3. folosit pentru a echilibra ecuatia;
   4. punctul īn care un reactiv este consumat complet īn reactie;
   5. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   
   
2. Densitatea solutiilor depinde de:
   1. presiune;
   2. cantitate;
   3. concentratie;
   4. temperatura;
   
   
3. 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. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   
   
4. Titrarea ca o operatiune de laborator implica:
   1. un standard sau reactiv de referinta;
   2. un indicator de pH care īsi schimba culoarea īn functie de pH-ul solutiei;
   3. o biureta;
   4. un pH-metru;
   5. masurarea masei;
   
   
5. Trebuie adaugat indicatorul:
   1. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   2. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   3. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   4. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   5. numai la sugestia supraveghetorului;
   
   

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 establish the coefficients of the chemical reaction;
   4. are necessary to take some information from reagent bottles;
   
   
2. Titration as a laboratory operation involves:
   1. a salt solution;
   2. a natrium hydroxide solution;
   3. an mixing of two ore more solutions;
   4. a sulphuric acid solution;
   
   
3. The indicator should be added:
   1. in large quantities, according to the principle 'only size matters';
   2. to provide a color change at equivalence point;
   3. only at the suggestion of the supervisor;
   4. in small quantities, to avoid the errors in observations and in calculations;
   
   
4. A redox process:
   1. involves changing of the aggregation states of some participants to the reaction;
   2. is always fast and safe;
   3. occurs only when we mix wrong substances in the laboratory;
   4. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
5. 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 number of atoms for each element;
   3. the liquid in the burette should be at the same level before and after conducting the experiment;
   4. the principle of the conservation of the energy;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. 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 necesara stabilirea coeficientilor reactiei chimice;
   4. este necesar a se lua unele informatii de pe sticlele de reactivi;
   
   
2. Titrarea ca o operatiune de laborator implica:
   1. o solutie de sare;
   2. o solutie de hidroxid de sodiu;
   3. amestecul a doua sau mai multe solutii;
   4. o solutie de acid sulfuric;
   
   
3. Trebuie adaugat indicatorul:
   1. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   2. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   3. numai la sugestia supraveghetorului;
   4. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   5. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   
   
4. Un proces redox:
   1. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   2. este īntotdeauna rapid si sigur;
   3. apare numai atunci cānd se amesteca substante gresit īn laborator;
   4. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
5. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. principiul conservarii volumului;
   2. principiul conservarii numarul de atomi pentru fiecare element;
   3. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   4. principiul conservarii energiei;
   5. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. When a chemical reaction is balanced, following should be considered:
   1. all glassware should be clean before and after conducting the experiment;
   2. the principle of the conservation of the volume;
   3. all glassware should be clean before, after and during the experiment;
   4. the principle of the conservation of the energy;
   
   
2. The indicator should be added:
   1. to provide a color change at equivalence point;
   2. in small quantities, to avoid the errors in observations and in calculations;
   3. in large quantities, according to the principle 'only size matters';
   4. only in special cases, when the burette is graded from its bottom to its top;
   
   
3. The density of the solutions depends on:
   1. time elapsed since were prepared;
   2. concentration;
   3. provider;
   4. pressure;
   
   
4. Titration as a laboratory operation involves:
   1. an mixing of two ore more solutions;
   2. a sulphuric acid solution;
   3. a salt solution;
   4. a natrium hydroxide solution;
   
   
5. A redox process:
   1. is always fast and safe;
   2. involves changing of the oxidation states of some participants to the reaction;
   3. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   2. principiul conservarii volumului;
   3. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   4. principiul conservarii energiei;
   
   
2. Trebuie adaugat indicatorul:
   1. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   2. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   3. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   4. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   
   
3. Densitatea solutiilor depinde de:
   1. timpul scurs de cand au fost pregatite;
   2. concentratie;
   3. furnizor;
   4. presiune;
   
   
4. Titrarea ca o operatiune de laborator implica:
   1. amestecul a doua sau mai multe solutii;
   2. o solutie de acid sulfuric;
   3. o solutie de sare;
   4. o solutie de hidroxid de sodiu;
   5. o biureta;
   
   
5. Un proces redox:
   1. este īntotdeauna rapid si sigur;
   2. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   3. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   5. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. In the laboratory were analyzed:
   1. the concentration of the water;
   2. the temperature of the water;
   3. the color of the water;
   4. the solubility of the water;
   
   
2. For a water sample following measures may be quantitatively expressed:
   1. total alkalinity;
   2. total acidity;
   3. purity;
   4. hardness;
   
   
3. EDTA is used:
   1. for safety precautions purposes;
   2. for complexing of Ca²⁺ and Mg²⁺ ions;
   3. for recharging of the resin for water softening;
   4. for indication of the equilibrium point in the reaction;
   
   
4. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   3. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   4. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   
   
5. We may say the followings:
   1. purification of the water may include labeling processes;
   2. purification of the water may include physical processes;
   3. purification of the water may include chemical processes;
   4. purification of the water may include biological processes;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Īn laborator au fost analizate:
   1. concentratia apei;
   2. temperatura apei;
   3. culoarea apei;
   4. solubilitatea apei;
   
   
2. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. alcalinitate totala;
   2. aciditate totala;
   3. puritate;
   4. duritate;
   
   
3. EDTA este utilizat:
   1. ca masura de siguranta;
   2. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   3. pentru reīncarcarea rasinii la dedurizarea apei;
   4. pentru indicarea punctului de echilibru īn reactie;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   3. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   4. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   
   
5. Putem spune urmatoarele:
   1. purificarea apei poate include procesele de etichetare;
   2. purificarea apei poate include procedee fizice;
   3. purificarea apei poate include procese chimice;
   4. purificarea apei poate include procese biologice;
   5. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. EDTA is used:
   1. for safety precautions purposes;
   2. as reagent for determining the hardness of the water;
   3. for complexing of Na¹⁺ and K¹⁺ ions;
   4. for recharging of the resin for water softening;
   
   
2. For a water sample following measures may be quantitatively expressed:
   1. color;
   2. hardness;
   3. total acidity;
   4. mineral acidity;
   
   
3. We may say the followings:
   1. purification of the water may include physical processes;
   2. purification of the water may include labeling processes;
   3. water is a good polar solvent;
   4. purification of the water may include biological processes;
   
   
4. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   2. NaOH + Cl⁺ -> NaCl + HO⁺
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   
   
5. In the laboratory were analyzed:
   1. the mass of the water;
   2. the acidity of the water;
   3. the alkalinity of the water;
   4. the hardness of the water;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. EDTA este utilizat:
   1. ca masura de siguranta;
   2. ca reactiv pentru determinarea duritatii apei;
   3. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   4. pentru reīncarcarea rasinii la dedurizarea apei;
   5. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   
   
2. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. culoare;
   2. duritate;
   3. aciditate totala;
   4. aciditate minerala;
   
   
3. Putem spune urmatoarele:
   1. purificarea apei poate include procedee fizice;
   2. purificarea apei poate include procesele de etichetare;
   3. apa este un solvent polar bun;
   4. purificarea apei poate include procese biologice;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   2. NaOH + Cl⁺ -> NaCl + HO⁺
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   
   
5. Īn laborator au fost analizate:
   1. masa apei;
   2. aciditatea apei;
   3. alcalinitatea apei;
   4. duritatea apei;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. In the laboratory were analyzed:
   1. the boiling point of the water;
   2. the hardness of the water;
   3. the mass of the water;
   4. the temperature of the water;
   
   
2. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   3. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   4. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   
   
3. For a water sample following measures may be quantitatively expressed:
   1. mineral acidity;
   2. purity;
   3. color;
   4. permanent alkalinity;
   
   
4. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + Cl⁺ -> NaCl + HO⁺
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + Cl^- -> NaCl + HO^-
   
   
5. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   3. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   4. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Īn laborator au fost analizate:
   1. punctul de fierbere al apei;
   2. duritatea apei;
   3. masa apei;
   4. temperatura apei;
   5. aciditatea apei;
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + HO⁺ -> H₂O + Cl⁺
   2. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   3. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   4. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   5. HCl + CO₃^2- -> HCO₃^- + Cl^-
   
   
3. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. aciditate minerala;
   2. puritate;
   3. culoare;
   4. alcalinitate permanenta;
   5. alcalinitate totala;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + Cl⁺ -> NaCl + HO⁺
   2. NaOH + NO₃^- -> NaNO₃ + HO^-
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + Cl^- -> NaCl + HO^-
   5. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   2. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   3. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   4. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   5. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. permanent alkalinity;
   2. total alkalinity;
   3. mineral acidity;
   4. purity;
   
   
2. EDTA is used:
   1. for safety precautions purposes;
   2. for complexing of Na¹⁺ and K¹⁺ ions;
   3. for recharging of the resin for water softening;
   4. as reagent for determining the hardness of the water;
   
   
3. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   2. HCl + HO^- -> H₂O + Cl^-
   3. HCl + HO⁺ -> H₂O + Cl⁺
   4. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   
   
4. In the laboratory were analyzed:
   1. the temperature of the water;
   2. the concentration of the water;
   3. the mass of the water;
   4. the hardness of the water;
   
   
5. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   2. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   3. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   4. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. alcalinitate permanenta;
   2. alcalinitate totala;
   3. aciditate minerala;
   4. puritate;
   5. aciditate totala;
   
   
2. EDTA este utilizat:
   1. ca masura de siguranta;
   2. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   3. pentru reīncarcarea rasinii la dedurizarea apei;
   4. ca reactiv pentru determinarea duritatii apei;
   5. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   2. HCl + HO^- -> H₂O+Cl^-
   3. HCl + HO⁺ -> H₂O + Cl⁺
   4. HCl + PO₄^3- -> HPO₄^2- + Cl^-
   
   
4. Īn laborator au fost analizate:
   1. temperatura apei;
   2. concentratia apei;
   3. masa apei;
   4. duritatea apei;
   5. punctul de fierbere al apei;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate totala:
   1. HCl + PO₄³⁺ -> H₂PO₄⁺ + Cl⁺
   2. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   3. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   4. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   
   

FINAL TEST AT LABORATORY
Water analysis

1. Following reactions may tok place when we analyse a sample of water for total alkalinity:
   1. NaOH + Ni²⁺ -> Ni(OH)₂ + Na⁺
   2. HCl + CO₃^2- -> H₂CO₃ + Cl^-
   3. HCl + PO₄^3- -> H₂PO₄^- + Cl^-
   4. HCl + CO₃²⁺ -> H₂CO₃ + Cl⁺
   
   
2. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + HCOO⁺ -> HCOONa + HO⁺
   2. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   3. NaOH + CH₃COO^- -> CH₃COONa + HO^-
   4. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   
   
3. In the laboratory were analyzed:
   1. the acidity of the water;
   2. the hardness of the water;
   3. the concentration of the water;
   4. the color of the water;
   
   
4. We may say the followings:
   1. water is pure only when is taken from a good freshwater mountain stream;
   2. purification of the water may include physical processes;
   3. purification of the water may include biological processes;
   4. purification of the water may include chemical processes;
   
   
5. In the laboratory the water were:
   1. softened using the resin column;
   2. biologically purified using the resin column;
   3. complexed by using EDTA titrimetric method;
   4. hardened using the resin column;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

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

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

1. Corrosion of metals:
   1. may provide useful raw materials for analysis;
   2. is the destruction of metals under the action of external factors;
   3. takes place merely from exposure to moisture in air;
   4. is the protection in time to chemical agents;
   
   
2. 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 degreased in sulfuric acid solution;
   3. the surface is measured before and after immersing it in H₂SO₄;
   4. was involved in the gravimetric method of corrosion analysis
   
   
3. In studied corrosion processes:
   1. a gas is released at both corrosion of zinc and aluminum;
   2. when a gas is released its volume depends on the amount of metal corroded;
   3. the metal it changes its oxidation state becoming an cation;
   4. the metal it changes its oxidation state becoming an anion;
   
   
4. The aluminum plate:
   1. the mass is measured before and after immersing it in NaOH;
   2. was degreased in sodium hydroxide solution;
   3. the surface is measured before and after immersing it in NaOH;
   4. was involved in the gravimetric method of corrosion analysis
   
   
5. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. Ni(CO)₄ -> Ni + CO
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   

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

1. Coroziunea metalelor:
   1. poate furniza materii prime utile pentru analiza;
   2. este distrugerea metalelor sub actiunea factorilor externi;
   3. are loc pur si simplu prin expunerea la umiditate īn aer;
   4. este protectia de durata impotriva agentilor chimici;
   
   
2. Pentru placa de zinc:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. a fost degresata īn solutie de acid sulfuric;
   3. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
3. Īn procesele de coroziune studiate:
   1. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   2. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   3. metalul isi schimba starea de oxidare pentru a deveni un cation;
   4. metalul isi schimba starea de oxidare pentru a deveni un anion;
   5. un gaz este eliberat numai la corodarea aluminiului;
   
   
4. Pentru placa de aluminiu:
   1. masa este masurata īnainte si dupa imersia īn NaOH;
   2. a fost degresata īn solutie de hidroxid de sodiu;
   3. suprafata se masoara īnainte si dupa imersia īn NaOH;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
5. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Fe -> H₂ + Fe²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. Ni(CO)₄ -> Ni + CO
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   

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

1. The aluminum plate:
   1. the surface is measured before and after immersing it in NaOH;
   2. was involved in the gravimetric method of corrosion analysis
   3. the mass is measured before and after immersing it in NaOH;
   4. was degreased in sodium hydroxide solution;
   
   
2. Corrosion of metals:
   1. is the destruction of metals under the action of external factors;
   2. takes place merely from exposure to moisture in air;
   3. can be reduced by passivation;
   4. may provide useful raw materials for analysis;
   
   
3. Which of the following reactions may be called as of corrosion:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. ZnO + CO -> Zn + CO₂
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   
   
4. In studied corrosion processes:
   1. a gas is released only the corrosion of zinc;
   2. a gas is released at both corrosion of zinc and aluminum;
   3. the metal it changes its oxidation state becoming an cation;
   4. the metal it changes its oxidation state becoming an anion;
   
   
5. The zinc plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was corroded in sulfuric solution;
   3. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   4. was degreased in sulfuric acid solution;
   
   

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

1. Pentru placa de aluminiu:
   1. suprafata se masoara īnainte si dupa imersia īn NaOH;
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. masa este masurata īnainte si dupa imersia īn NaOH;
   4. a fost degresata īn solutie de hidroxid de sodiu;
   
   
2. Coroziunea metalelor:
   1. este distrugerea metalelor sub actiunea factorilor externi;
   2. are loc pur si simplu prin expunerea la umiditate īn aer;
   3. poate fi redusa prin pasivare;
   4. poate furniza materii prime utile pentru analiza;
   
   
3. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. ZnO + CO -> Zn + CO₂
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   5. Fe₂O₃ + CO -> Fe + CO₂
   
   
4. Īn procesele de coroziune studiate:
   1. un gaz este eliberat numai la corodarea zincului;
   2. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   3. metalul isi schimba starea de oxidare pentru a deveni un cation;
   4. metalul isi schimba starea de oxidare pentru a deveni un anion;
   
   
5. Pentru placa de zinc:
   1. a fost implicata īn metoda volumetrica de analiza a coroziunii
   2. a fost corodata īn solutie sulfuric;
   3. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   4. a fost degresata īn solutie de acid sulfuric;
   
   

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

1. In studied corrosion processes:
   1. a gas is released at both corrosion of zinc and aluminum;
   2. the metal it changes its oxidation state becoming an anion;
   3. a gas is released only the corrosion of zinc;
   4. always the metal changes its oxidation state;
   
   
2. 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. the mass is measured before and after immersing it in H₂SO₄;
   4. the volume is measured before and after immersing it in H₂SO₄;
   
   
3. Which of the following reactions may be called as of corrosion:
   1. Ni(CO)₄ -> Ni + CO
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   4. H⁺ + Fe -> H₂ + Fe²⁺
   
   
4. The aluminum plate:
   1. was involved in the gravimetric method of corrosion analysis
   2. was involved in the volumetric method of corrosion analysis
   3. the mass is measured before and after immersing it in NaOH;
   4. the surface is measured before and after immersing it in NaOH;
   
   
5. Corrosion of metals:
   1. is the destruction of metals under the action of external factors;
   2. is the protection in time to chemical agents;
   3. is a beneficial process that shows the stability of metals;
   4. can be reduced by electroplating;
   
   

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

1. Īn procesele de coroziune studiate:
   1. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   2. metalul isi schimba starea de oxidare pentru a deveni un anion;
   3. un gaz este eliberat numai la corodarea zincului;
   4. īntotdeauna metalul isi schimba starea de oxidare;
   
   
2. 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. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   4. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   
   
3. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. Ni(CO)₄ -> Ni + CO
   2. H⁺ + Zn -> H₂ + Zn²⁺
   3. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   4. H⁺ + Fe -> H₂ + Fe²⁺
   5. ZnO + CO -> Zn + CO₂
   
   
4. 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. masa este masurata īnainte si dupa imersia īn NaOH;
   4. suprafata se masoara īnainte si dupa imersia īn NaOH;
   
   
5. Coroziunea metalelor:
   1. este distrugerea metalelor sub actiunea factorilor externi;
   2. este protectia de durata impotriva agentilor chimici;
   3. este un proces benefic care arata stabilitatea metalelor;
   4. poate fi redusa prin galvanizare;
   
   

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

1. 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. may provide useful raw materials for analysis;
   4. can be reduced by electroplating;
   
   
2. Which of the following reactions may be called as of corrosion:
   1. ZnO + CO -> Zn + CO₂
   2. H⁺ + Ni -> H₂ + Ni²⁺
   3. H⁺ + Zn -> H₂ + Zn²⁺
   4. H⁺ + Fe -> H₂ + Fe²⁺
   
   
3. The aluminum plate:
   1. was involved in the volumetric method of corrosion analysis
   2. was degreased in sodium hydroxide solution;
   3. was corroded in sodium hydroxide solution;
   4. the volume is measured before and after immersing it in NaOH;
   
   
4. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an cation;
   2. always the metal changes its oxidation state;
   3. a gas is released only the corrosion of aluminum;
   4. the metal it changes its oxidation state becoming an anion;
   
   
5. The zinc plate:
   1. was involved in the gravimetric method of corrosion analysis
   2. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   3. the mass is measured before and after immersing it in H₂SO₄;
   4. the volume is measured before and after immersing it in H₂SO₄;
   
   

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

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

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

1. The aluminum plate:
   1. was corroded in sodium hydroxide solution;
   2. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   3. the surface is measured before and after immersing it in NaOH;
   4. was involved in the gravimetric method of corrosion analysis
   
   
2. Corrosion of metals:
   1. takes place merely from exposure to moisture in air;
   2. may provide useful raw materials for analysis;
   3. can be reduced by electroplating;
   4. is the protection in time to chemical agents;
   
   
3. Which of the following reactions may be called as of corrosion:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. H⁺ + Ni -> H₂ + Ni²⁺
   4. Al₂O₃ + NaOH -> NaAlO₂
   
   
4. The zinc plate:
   1. was corroded in sulfuric solution;
   2. the surface is measured before and after immersing it in H₂SO₄;
   3. was degreased in sulfuric acid solution;
   4. the mass is measured before and after immersing it in H₂SO₄;
   
   
5. 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 zinc;
   4. a gas is released only the corrosion of aluminum;
   
   

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

1. Pentru placa de aluminiu:
   1. a fost corodata īn solutie de hidroxid de sodiu;
   2. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   3. suprafata se masoara īnainte si dupa imersia īn NaOH;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
2. Coroziunea metalelor:
   1. are loc pur si simplu prin expunerea la umiditate īn aer;
   2. poate furniza materii prime utile pentru analiza;
   3. poate fi redusa prin galvanizare;
   4. este protectia de durata impotriva agentilor chimici;
   
   
3. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   3. H⁺ + Ni -> H₂ + Ni²⁺
   4. Al₂O₃ + NaOH -> NaAlO₂
   5. ZnO + CO -> Zn + CO₂
   
   
4. Pentru placa de zinc:
   1. a fost corodata īn solutie sulfuric;
   2. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   3. a fost degresata īn solutie de acid sulfuric;
   4. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   5. a fost implicata īn metoda volumetrica de analiza a coroziunii
   
   
5. 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 zincului;
   4. un gaz este eliberat numai la corodarea aluminiului;
   5. metalul isi schimba starea de oxidare pentru a deveni un anion;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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