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

1. We may say the followings:
   1. the molecules have speeds in all gaseous, liquid and solid states;
   2. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   3. the molecules have energy only in gaseous state;
   4. the molecules have speeds only in gaseous and liquid states;
   
   
2. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   2. H₂O \=\ H⁺ + HO^-
   3. NH₃ + HCl \=\ NH₄Cl
   4. H⁺ + HO^- \=\ H₂O
   
   
3. The chronometer is used in the experiment for:
   1. measuring of the diffusion time;
   2. synchronization of the diffusion times;
   3. extracting the information necessary to calculate the diffusion coefficients;
   4. to keep us busy;
   
   
4. 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 length of the tube and not of the width of the tube;
   4. the concentrations of the solutions used;
   
   
5. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory or our breathing;
   2. presence of the ammonia;
   3. unproper illumination in the laboratory and our breathing;
   4. formation of ammonium chloride;
   
   

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

1. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   2. energia cinetica a unei molecule este afectata de temperatura, presiune si dimensiunea moleculei;
   3. moleculele au energie numai īn stare gazoasa;
   4. moleculele au viteze numai īn stare gazoasa si lichida;
   
   
2. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   2. H₂O \=\ H⁺ + HO^-
   3. NH₃ + HCl \=\ NH₄Cl
   4. H⁺ + HO^- \=\ H₂O
   5. HCl + H₂O \=\ Cl^- + H₃O⁺
   
   
3. Cronometrul este utilizat īn experimentul pentru:
   1. masurarea timpului de difuzie;
   2. sincronizarea timpilor de difuzie;
   3. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   4. sa ne tina ocupati;
   
   
4. 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. lungimea tubului si nu latimea tubului;
   4. concentratiile solutiilor utilizate;
   
   
5. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   2. prezentei amoniacului;
   3. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   4. formarea clorurii de amoniu;
   5. experimentului nostru proiectat pentru a captura produsul de reactie;
   
   

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

1. The time to the formation of the ring in the experiment is dependent on:
   1. the speed of diffusion of each involved species;
   2. the length of the tube and the width of the tube;
   3. the width of the tube and not of the length of the tube;
   4. the length of the tube and not of the width of the tube;
   
   
2. We may say the followings:
   1. the kinetic energy of a molecule is affected by temperature and pressure;
   2. the molecules have speeds only in gaseous state;
   3. diffusion process appears in all gaseous, liquid and solid states;
   4. diffusion process appears only in gaseous and liquid states;
   
   
3. The chronometer is used in the experiment for:
   1. indication of the moment when we should pay attention to the experiment;
   2. measuring of the diffusion time;
   3. synchronization of the diffusion times;
   4. extracting the information necessary to calculate the diffusion coefficients;
   
   
4. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + HCl \=\ NH₄Cl
   2. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   3. H₂O \=\ H⁺ + HO^-
   4. H⁺ + HO^- \=\ H₂O
   
   
5. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory and our breathing;
   2. unproper illumination in the laboratory or our breathing;
   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. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. viteza de difuzie a fiecarei specii implicate;
   2. lungimea tubului si latimea tubului;
   3. latimea tubului si nu lungimea tubului;
   4. lungimea tubului si nu latimea tubului;
   
   
2. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. energia cinetica a unei molecule este afectata de temperatura si presiune;
   2. moleculele au viteze numai īn stare gazoasa;
   3. proces de difuzie apare īn toate starile gazoasa, lichida si solida;
   4. proces de difuzie apare numai īn stare gazoasa si lichida;
   5. energia cinetica a unei molecule este afectata de numai temperatura;
   
   
3. Cronometrul este utilizat īn experimentul pentru:
   1. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   2. masurarea timpului de difuzie;
   3. sincronizarea timpilor de difuzie;
   4. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   
   
4. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₃ + HCl \=\ NH₄Cl
   2. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   3. H₂O \=\ H⁺ + HO^-
   4. H⁺ + HO^- \=\ H₂O
   5. NH₄⁺ + Cl^- \=\ NH₄Cl
   
   
5. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   2. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   3. formarea clorurii de amoniu;
   4. prezentei clorului;
   5. prezentei amoniacului;
   
   

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

1. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory and our breathing;
   2. unproper illumination in the laboratory or our breathing;
   3. formation of ammonium chloride;
   4. presence of the chlorine;
   
   
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 the same direction;
   4. are considered to be at the same temperature, but may have different speeds;
   
   
3. We may say the followings:
   1. the molecules have speeds only in gaseous and liquid states;
   2. the kinetic energy of a molecule is affected by temperature and pressure;
   3. the molecules have speeds only in gaseous state;
   4. the molecules have speeds in all gaseous, liquid and solid states;
   
   
4. 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 mode energy or mode speed of each involved species;
   3. the average energy or average speed of each involved species;
   4. the speed of diffusion of each involved species;
   
   
5. The chronometer is used in the experiment for:
   1. indication of the moment when we should pay attention to the experiment;
   2. synchronization of the diffusion times;
   3. extracting the information necessary to calculate the speeds ratio;
   4. measuring of the diffusion time;
   
   

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

1. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   2. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   3. formarea clorurii de amoniu;
   4. prezentei clorului;
   5. prezentei amoniacului;
   
   
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 deplaseaza īn aceeasi directie;
   4. sunt considerate a fi la aceeasi temperatura, dar pot avea viteze diferite;
   
   
3. Va rugam sa decida cu adevarat / fals pentru urmatoarele afirmatii:
   1. moleculele au viteze numai īn stare gazoasa si lichida;
   2. energia cinetica a unei molecule este afectata de temperatura si presiune;
   3. moleculele au viteze numai īn stare gazoasa;
   4. moleculele au viteze īn toate starile gazoasa, lichida si solida;
   5. moleculele au energie numai īn stare gazoasa si lichida;
   
   
4. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   2. viteza la moda sau energia la moda a fiecarei specii implicate;
   3. energia medie sau viteza medie a fiecarei specii implicate;
   4. viteza de difuzie a fiecarei specii implicate;
   
   
5. Cronometrul este utilizat īn experimentul pentru:
   1. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   2. sincronizarea timpilor de difuzie;
   3. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   4. masurarea timpului de difuzie;
   
   

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 length of the tube and not of the width of the tube;
   2. the length of the tube and the width of the tube;
   3. the virtual speeds and not the real speeds of each involved species;
   4. the real speeds and not the virtual speeds of each involved species;
   
   
2. The time to the formation of the ring in the experiment is dependent on:
   1. the mode energy or mode speed of each involved species;
   2. the real speeds and not the virtual speeds of each involved species;
   3. the propagation of the species as ions and not as neutral molecules;
   4. the propagation of the species as neutral molecules and not as ions;
   
   
3. The chronometer is used in the experiment for:
   1. measuring of the diffusion time;
   2. to keep us busy;
   3. indication of the moment when we should pay attention to the experiment;
   4. extracting the information necessary to calculate the speeds ratio;
   
   
4. The fog observed during the experiment is due to:
   1. unproper illumination in the laboratory or our breathing;
   2. our experiment designed to trap the product of the reaction;
   3. formation of ammonium chloride;
   4. unproper illumination in the laboratory and our breathing;
   
   
5. At the ends of the tube following equilibrium reactions occurs:
   1. NH₃ + H₂O \=\ NH₄⁺ + HO^-
   2. H₂O \=\ H⁺ + HO^-
   3. NH₃ + HCl \=\ NH₄Cl
   4. H⁺ + HO^- \=\ H₂O
   
   

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

1. Pozitia inelului īn experimentul este dependenta de:
   1. lungimea tubului si nu latimea tubului;
   2. lungimea tubului si latimea tubului;
   3. vitezele virtuale si nu vitezele reale ale fiecarei specii implicate;
   4. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   
   
2. Timpul pentru formarea inelului īn experimentul este dependenta de:
   1. viteza la moda sau energia la moda a fiecarei specii implicate;
   2. vitezele reale si nu vitezele virtuale ale fiecarei specii implicate;
   3. propagarea speciilor ca ionii si nu ca si molecule neutre;
   4. propagarea speciilor ca si molecule neutre si nu ca si ioni;
   
   
3. Cronometrul este utilizat īn experimentul pentru:
   1. masurarea timpului de difuzie;
   2. sa ne tina ocupati;
   3. indicarea momentului cānd trebuie sa se acorde atentie experimentului;
   4. extragerea informatiilor necesare pentru calcularea raportului vitezelor;
   5. extragerea informatiilor necesare pentru a calcula coeficientii de difuzie;
   
   
4. Ceata observata īn timpul experimentului se datoreaza:
   1. iluminarii necorespunzatoare īn laborator sau respiratie noastre;
   2. experimentului nostru proiectat pentru a captura produsul de reactie;
   3. formarea clorurii de amoniu;
   4. iluminarii necorespunzatoare īn laborator si respiratiei noastre;
   
   
5. La capetele tubului urmatoarele reactii de echilibru apar:
   1. NH₃ + H₂O \ = \ NH₄⁺ + HO^-
   2. H₂O \=\ H⁺ + HO^-
   3. NH₃ + HCl \=\ NH₄Cl
   4. H⁺ + HO^- \=\ H₂O
   5. NH₄⁺ + Cl^- \=\ 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 have same speed;
   2. all have same energy;
   3. all are moving in the same direction;
   4. are considered to be at the same temperature, but may have different energies;
   
   
2. We may say the followings:
   1. diffusion process appears only in gaseous state;
   2. the molecules have energy only in gaseous and liquid states;
   3. the molecules have energy only in gaseous state;
   4. the kinetic energy of a molecule is affected by temperature, pressure and size of the molecule;
   
   
3. The position of the ring in the experiment is dependent on:
   1. the propagation of the species as neutral molecules and not as ions;
   2. the propagation of the species as ions and not as neutral molecules;
   3. the virtual speeds and not the real speeds of each involved species;
   4. the length of the tube and the width of the tube;
   
   
4. The time to the formation of the ring in the experiment is dependent on:
   1. the propagation of the species as ions and not as neutral molecules;
   2. the propagation of the species as neutral molecules and not as ions;
   3. the length of the tube and the width of the tube;
   4. the average energy or average speed of each involved species;
   
   
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. presence of the chlorine;
   4. unproper illumination in the laboratory and our breathing;
   
   

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

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

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

1. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. increasing of the pressure of a gas when was heated;
   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;
   
   
2. The values taken from the experiment conducted in the laboratory indicated that:
   1. oxigen were released as result of the decomposition;
   2. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   3. the ideal model of a gas approximated the best the behavior of the released gas;
   4. air were released as result of the decomposition;
   
   
3. For gaseous state:
   1. we need to take supplementary precautions in the laboratory;
   2. the pressure depends on the model which are used to approximate it;
   3. the pressure is unchanged when a chemical reaction occurs;
   4. the pressure is subject to change when a chemical reaction occurs;
   
   
4. A state equation for a real gas is:
   1. a relation between an certain number of state parameters;
   2. usable in the laboratory, but is not to be used somewhere else;
   3. a relation obtained after conducting of the experiment;
   4. a relation derived to approximate the relation between state parameters;
   
   
5. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. opening a bubble water bottle;
   2. Ag + O₂ -> Ag₂O;
   3. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   4. H₂O₂ -> H₂O + O₂;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. cresterea presiunii unui gaz cānd s-a īncalzit;
   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. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   
   
2. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. oxigenul au fost eliberat ca urmare a descompunerii;
   2. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   4. aer a fost eliberat ca urmare a descompunerii;
   
   
3. Pentru stare gazoasa:
   1. avem nevoie pentru a lua masuri de precautie suplimentare īn laborator;
   2. presiunea depinde de modelul care este utilizat pentru o aproxima;
   3. presiunea este neschimbata cānd apare o reactie chimica;
   4. presiunea se pot modifica atunci cānd apare o reactie chimica;
   
   
4. O ecuatie de stare pentru un gaz real este:
   1. o relatie īntre un anumit numar de parametri de stare;
   2. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   3. o relatie obtinut dupa efectuarea experimentului;
   4. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   
   
5. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. deschiderea unei sticle de apa cu bule;
   2. Ag + O₂ -> Ag₂O;
   3. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   4. H₂O₂ -> H₂O + O₂;
   5. KClO₃ -> KCl + O₂;
   
   

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

1. In the laboratory were studied:
   1. the producing of some gas as result of a lost of the mass of a solid;
   2. the lost of the mass of a solid as result of producing of some gas;
   3. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   4. increasing of the pressure of a gas when was heated;
   
   
2. A state equation for a real gas is:
   1. a relation between an certain number of state parameters;
   2. a relation between an unlimited number of state parameters;
   3. usable in the laboratory, but is not to be used somewhere else;
   4. a relation obtained after conducting of the experiment;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. opening a bubble water bottle;
   2. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   3. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   4. KCl + O₂ -> KClO₃;
   
   
4. For gaseous state:
   1. the pressure is approximately the same as in liquid state;
   2. it exists an equation for all, p · V = n · R · T;
   3. the pressure depends on the model which are used to approximate it;
   4. the pressure is exactly the same as in liquid state;
   
   
5. The values taken from the experiment conducted in the laboratory indicated that:
   1. the ideal model of a gas approximated the best 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. we do not possess enough information to decide what gas was released from the reaction;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Īn laborator s-au studiat:
   1. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   2. pierdut din masa de solid ca urmare a producerii unor gaze;
   3. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   4. cresterea presiunii unui gaz cānd s-a īncalzit;
   
   
2. O ecuatie de stare pentru un gaz real este:
   1. o relatie īntre un anumit numar de parametri de stare;
   2. o relatie īntre un numar nelimitat de parametri de stare;
   3. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   4. o relatie obtinut dupa efectuarea experimentului;
   5. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. deschiderea unei sticle de apa cu bule;
   2. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   3. K₂MnO₄ + MnO₂ + O₂ -> KMnO₄;
   4. KCl + O₂ -> KClO₃;
   
   
4. Pentru stare gazoasa:
   1. presiunea este aproximativ aceeasi ca si īn stare lichida;
   2. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   3. presiunea depinde de modelul care este utilizat pentru o aproxima;
   4. presiunea este exact la fel ca si īn stare lichida;
   
   
5. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   2. cu cat mai 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. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   
   

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

1. For gaseous state:
   1. the pressure is exactly the same as in liquid state;
   2. it exists an equation for all, p · V = n · R · T;
   3. the pressure depends on the model which are used to approximate it;
   4. the pressure is much lower than in liquid state;
   
   
2. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. KNO₃ -> KNO₂ + O₂;
   2. H₂O₂ -> H₂O + O₂;
   3. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   
3. A state equation for a real gas is:
   1. usable in the laboratory, but is not to be used somewhere else;
   2. a relation derived to approximate the relation between state parameters;
   3. a relation between an certain number of state parameters;
   4. a relation obtained after conducting of the experiment;
   
   
4. 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. increasing of the pressure of a gas when was heated;
   4. decomposition of the potasium chloride to potasium chlorate when ozone is released;
   
   
5. The values taken from the experiment conducted in the laboratory indicated that:
   1. ozone were released as result of the decomposition;
   2. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   3. oxigen were released as result of the decomposition;
   4. the ideal model of a gas approximated the best the behavior of the released gas;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pentru stare gazoasa:
   1. presiunea este exact la fel ca si īn stare lichida;
   2. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   3. presiunea depinde de modelul care este utilizat pentru o aproxima;
   4. presiunea este mult mai mica decāt īn stare lichida;
   
   
2. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. KNO₃ -> KNO₂ + O₂;
   2. H₂O₂ -> H₂O + O₂;
   3. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   
3. O ecuatie de stare pentru un gaz real este:
   1. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   2. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   3. o relatie īntre un anumit numar de parametri de stare;
   4. o relatie obtinut dupa efectuarea experimentului;
   
   
4. 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. cresterea presiunii unui gaz cānd s-a īncalzit;
   4. descompunerea clorurii de potasiu la cloratul de potasiu cānd ozonul este eliberat;
   5. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₂;
   
   
5. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. ozonul au fost eliberat ca urmare a descompunerii;
   2. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. oxigenul au fost eliberat ca urmare a descompunerii;
   4. modelul ideal al unui gaz aproximeaza cel mai bine comportamentul gazului eliberat;
   
   

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

1. The values taken from the experiment conducted in the laboratory indicated that:
   1. 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. air were released as result of the decomposition;
   4. we possess enough information to decide what gas was released from the reaction;
   
   
2. For gaseous state:
   1. the pressure depends on the model which are used to approximate it;
   2. the pressure is much lower than in liquid state;
   3. it exists an equation for all, p · V = n · R · T;
   4. the pressure is exactly the same as in liquid state;
   
   
3. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. H₂O₂ -> H₂O + O₂;
   2. KNO₂ + O₂ -> KNO₃;
   3. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   4. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   
   
4. In the laboratory were studied:
   1. the producing of some gas as result of a lost of the mass of a solid;
   2. the obtaining of the oxygen, by using the reaction KClO₃ (+MnO₂, heat) -> KCl + O₃;
   3. increasing of the pressure of a gas when was heated;
   4. the lost of the mass of a solid as result of producing of some gas;
   
   
5. A state equation for a real gas is:
   1. a relation derived to approximate the relation between state parameters;
   2. a relation which takes into account certain deviations from the ideal model;
   3. usable in the laboratory, but is not to be used somewhere else;
   4. a relation between an unlimited number of state parameters;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. ozonul au fost eliberat ca urmare a descompunerii;
   2. nu avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   3. aer a fost eliberat ca urmare a descompunerii;
   4. avem suficiente informatii pentru a decide ce gaz a fost eliberat din reactie;
   5. modelul ideal al unui gaz aproximeaza cel mai rau comportamentul gazului eliberat;
   
   
2. Pentru stare gazoasa:
   1. presiunea depinde de modelul care este utilizat pentru o aproxima;
   2. presiunea este mult mai mica decāt īn stare lichida;
   3. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   4. presiunea este exact la fel ca si īn stare lichida;
   5. presiunea este neschimbata cānd apare o reactie chimica;
   
   
3. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. H₂O₂ -> H₂O + O₂;
   2. KNO₂ + O₂ -> KNO₃;
   3. K₂CrO₄ + Cr₂O₃ + O₂ -> K₂Cr₂O₇;
   4. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   
   
4. Īn laborator s-au studiat:
   1. producerea unor gaze ca urmare a unei pierderi de masa a unui solid;
   2. obtinerea de oxigen, folosind reactia KClO₃(+ MnO₂, caldura) -> KCl + O₃;
   3. cresterea presiunii unui gaz cānd s-a īncalzit;
   4. pierdut din masa de solid ca urmare a producerii unor gaze;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie derivata pentru a aproxima relatia dintre parametrii de stare;
   2. o relatie care 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 īntre un numar nelimitat de parametri de stare;
   5. o relatie īntre un anumit numar de parametri de stare;
   
   

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

1. Based on our experience after conducting the experiment, we may say that the oxygen can be obtained from:
   1. Ag + O₂ -> Ag₂O;
   2. opening a bubble water bottle;
   3. KCl + O₂ -> KClO₃;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   
   
2. The values taken from the experiment conducted in the laboratory indicated that:
   1. air were released as result of the decomposition;
   2. as more simple the model is used to approximate the behavior, as best agreement is obtained;
   3. oxigen were released as result of the decomposition;
   4. ozone were released as result of the decomposition;
   
   
3. In the laboratory were studied:
   1. decomposition of the potasium chlorate to potasium chloride when ozone is released;
   2. the lost of the mass of a solid as result of producing of some gas;
   3. increasing of the pressure of a gas when was heated;
   4. decomposition of the potasium chlorate to potasium chloride when oxygen is released;
   
   
4. For gaseous state:
   1. it exists an equation for all, p · V = n · R · T;
   2. the pressure is exactly the same as in liquid state;
   3. the pressure depends on the model which are used to approximate it;
   4. the pressure is much higher than in liquid state;
   
   
5. A state equation for a real gas is:
   1. a relation which takes into account certain deviations from the ideal model;
   2. a relation between an certain number of state parameters;
   3. usable in the laboratory, but is not to be used somewhere else;
   4. a relation obtained after conducting of the experiment;
   
   

TEST DE FINAL DE LABORATOR
Obtinerea oxigenului: studiul legilor gazelor

1. Pe baza experientei noastre dupa efectuarea experimentului, putem spune ca oxigenul poate fi obtinut din:
   1. Ag + O₂ -> Ag₂O;
   2. deschiderea unei sticle de apa cu bule;
   3. KCl + O₂ -> KClO₃;
   4. KMnO₄ -> K₂MnO₄ + MnO₂ + O₂;
   5. K₂Cr₂O₇ -> K₂CrO₄ + Cr₂O₃ + O₂;
   
   
2. Valorile luate din experimentul efectuat īn laborator au indicat ca:
   1. aer a fost eliberat ca urmare a descompunerii;
   2. cu cat mai simplu este modelul folosit pentru a aproxima comportamentul, cu atat este mai bun este agrementul;
   3. oxigenul au fost eliberat ca urmare a descompunerii;
   4. ozonul au fost eliberat ca urmare a descompunerii;
   
   
3. Īn laborator s-au studiat:
   1. descompunerea cloratului de potasiu la clorura de potasiu cānd ozonul este eliberat;
   2. pierdut din masa de solid ca urmare a producerii unor gaze;
   3. cresterea presiunii unui gaz cānd s-a īncalzit;
   4. descompunerea cloratului de potasiu la clorura de potasiu cānd oxigenul este eliberat;
   
   
4. Pentru stare gazoasa:
   1. ca exista o ecuatie utilizabila mereu, p · V = n · R · T;
   2. presiunea este exact la fel ca si īn stare lichida;
   3. presiunea depinde de modelul care este utilizat pentru o aproxima;
   4. presiunea este mult mai mare decāt īn stare lichida;
   5. presiunea este mult mai mica decāt īn stare lichida;
   
   
5. O ecuatie de stare pentru un gaz real este:
   1. o relatie care sa tina cont de anumite abateri de la modelul ideal;
   2. o relatie īntre un anumit numar de parametri de stare;
   3. utilizabila īn laborator, dar nu este de a fi utilizata īn alta parte;
   4. o relatie obtinut dupa efectuarea experimentului;
   5. o relatie īntre un numar nelimitat de parametri de stare;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. 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. for the paper to work as isolator;
   3. for stopping after a while the chemical reaction that takes place;
   4. to accomodate ourselves to use chemicals;
   
   
2. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   
   
3. When lead is identified:
   1. precautions should be made for toxic wastes disposal;
   2. a heat release is observed;
   3. a red-brown complex appears;
   4. a blue complex appears;
   
   
4. The paper requires before analysis of the sample:
   1. to measure its surface;
   2. to be dry;
   3. to be tested;
   4. to be cut in small pieces;
   
   
5. When aluminum is identified:
   1. is identified as Al³⁺ cation;
   2. supplementary precautions should be taken, because the plates are made from aluminum too;
   3. only one identification reaction is possible;
   4. is identified as Al¹⁺ cation;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. 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 ca hartia sa actioneze ca izolator;
   3. pentru oprirea dupa un timp reactiei chimice care are loc;
   4. sa ne acomodam in a utiliza substante chimice;
   5. pentru a avea ceva de a face īn laborator;
   
   
2. Sarcinile electrice ce apar la trecerea metalelor īn solutie pot fi:
   1. Fe²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   2. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   4. Fe²⁺; Co²⁺; Ni²⁺; Cu²⁺; Zn²⁺; Al³⁺
   5. Fe²⁺; Ni³⁺; Cu¹⁺; Zn³⁺; Co³⁺; Cr²⁺
   
   
3. Cānd plumbul este identificat:
   1. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   2. se observa o eliberare de caldura;
   3. apare un complex rosu-brun;
   4. apare un complex albastru;
   
   
4. Hartia necesita ca īnainte de analiza probei:
   1. sa i se masoare suprafata;
   2. sa fie uscata;
   3. sa fie testata;
   4. sa fie taiata īn bucati mici;
   
   
5. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al³⁺;
   2. ar trebui sa fie luate masuri de precautie suplimentare deoarece talerele sunt realizate din aluminiu deasemenea;
   3. doar o reactie de identificare este posibila;
   4. este identificat ca cationul Al¹⁺;
   5. este identificat ca cationul Al²⁺;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. This method of analysis of metals and alloys is:
   1. not useful for both metals and alloys;
   2. a nondestructive method of analysis;
   3. a destructive method of analysis;
   4. a quantitative method of analysis;
   
   
2. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as anions;
   2. elements from the solution are passed into sample as metals;
   3. electric current passes the sample and the paper;
   4. water dissociation is inhibited;
   
   
3. When lead is identified:
   1. precautions should be made for toxic wastes disposal;
   2. a yellow complex appears;
   3. a violet complex appears;
   4. interference of other ions may affect the outcome;
   
   
4. The paper requires before analysis of the sample:
   1. to be weighted;
   2. to be burned;
   3. to be cut in small pieces;
   4. to measure its surface;
   
   
5. When aluminum is identified:
   1. the presence of other ions may produce a false negative outcome;
   2. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   3. only one identification reaction is possible;
   4. is identified as Al²⁺ cation;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Aceasta metoda de analiza de metale si aliaje este:
   1. nu este utila nici pentru metale nici pentru aliaje;
   2. o metoda nedistructiva de analiza;
   3. o metoda distructiva de analiza;
   4. o metoda cantitativa de analiza;
   
   
2. Cānd circuitul electric este īnchis:
   1. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   2. elemente din solutie sunt trecute īn proba ca metale;
   3. curent electric trece prin proba si hārtie;
   4. disocierea apei este inhibata;
   5. cationii din solutie sunt trecuti īn proba ca metale;
   
   
3. Cānd plumbul este identificat:
   1. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   2. apare un complex galben;
   3. apare un complex violet;
   4. interferenta altor ioni poate afecta rezultatul;
   5. se observa o eliberare de caldura;
   
   
4. Hartia necesita ca īnainte de analiza probei:
   1. sa fie cantarita;
   2. sa fie arsa;
   3. sa fie taiata īn bucati mici;
   4. sa i se masoare suprafata;
   5. sa fie testata;
   
   
5. Cānd aluminiu este identificat:
   1. prezenta altor ioni poate produce un rezultat fals negativ;
   2. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   3. doar o reactie de identificare este posibila;
   4. este identificat ca cationul Al²⁺;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. The electric charges after passing the metals into solution may be:
   1. Fe²⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   
   
2. This method of analysis of metals and alloys is:
   1. not useful for both metals and alloys;
   2. useful for alloys, not so useful for metals;
   3. a quantitative method of analysis;
   4. too ancient to be used today in the laboratory;
   
   
3. When aluminum is identified:
   1. the presence of other ions may produce a true negative outcome;
   2. the presence of other ions may produce a true positive outcome;
   3. using of ammonium hidroxide is enough in order to have a clear guess about the presence of aluminum;
   4. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   
   
4. When lead is identified:
   1. the reactions used clearly indicates its presence;
   2. a blue complex appears;
   3. dangerous substances are used;
   4. interference of other ions may affect the outcome;
   
   
5. When the electrical circuit is closed:
   1. anions from the solution are passed into sample as metals;
   2. elements from the metals are passed into solution as anions;
   3. electric current passes the sample and the paper;
   4. water dissociation is inhibited;
   
   

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⁺; Ni⁴⁺; Cu¹⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   2. Fe³⁺; Ni²⁺; Cu²⁺; Zn²⁺; Co²⁺; Cr³⁺
   3. Fe²⁺; Pb²⁺; Sn⁴⁺; Zn²⁺; Co⁵⁺; Cr⁶⁺
   4. Fe²⁺; Ni¹⁺; Cu¹⁺; Zn³⁺; Co²⁺; Cr⁶⁺
   
   
2. Aceasta metoda de analiza de metale si aliaje este:
   1. nu este utila nici pentru metale nici pentru aliaje;
   2. utila pentru aliaje, nu atāt de utila pentru metale;
   3. o metoda cantitativa de analiza;
   4. prea veche pentru a fi utilizata īn prezent īn laborator;
   5. o metoda nedistructiva de analiza;
   
   
3. Cānd aluminiu este identificat:
   1. prezenta altor ioni poate produce un rezultat adevarat negativ;
   2. prezenta altor ioni poate produce un rezultat adevarat pozitiv;
   3. folosirea hidroxidului de amoniu este suficient pentru a avea indicii clare cu privire la prezenta aluminiului;
   4. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   
   
4. Cānd plumbul este identificat:
   1. reactiile utilizate īn mod clar ii indica prezenta;
   2. apare un complex albastru;
   3. sunt utilizate substante periculoase;
   4. interferenta altor ioni poate afecta rezultatul;
   5. apare un complex rosu-brun;
   
   
5. Cānd circuitul electric este īnchis:
   1. anionii din solutie sunt trecuti īn proba ca metale;
   2. elemente din metalele sunt trecute īn solutie sub forma de anioni;
   3. curent electric trece prin proba si hārtie;
   4. disocierea apei este inhibata;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. This method of analysis of metals and alloys is:
   1. a nondestructive method of analysis;
   2. a gravimetric method of analysis;
   3. useful for pure metals, not so useful for alloys;
   4. a quantitative method of analysis;
   
   
2. When the electrical circuit is closed:
   1. elements from the metals are passed into solution as cations;
   2. water dissociation is inhibited;
   3. cations from the solution are passed into sample as metals;
   4. electric current passes the sample and the paper;
   
   
3. The paper requires before analysis of the sample:
   1. to be burned;
   2. to be cut in small pieces;
   3. to be acidified;
   4. to be tested;
   
   
4. When lead is identified:
   1. the reactions used clearly indicates its presence;
   2. a red-brown complex appears;
   3. precautions should be made for toxic wastes disposal;
   4. a violet complex appears;
   
   
5. When aluminum is identified:
   1. using of alizarin along with ammonium hidroxide provide a more selective indication about the presence of aluminum;
   2. using of alizarin along with ammonium hidroxide provide a red colored complex;
   3. the presence of other ions may produce a true positive outcome;
   4. there are many identification reactions possible;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Aceasta metoda de analiza de metale si aliaje este:
   1. o metoda nedistructiva de analiza;
   2. o metoda gravimetrica de analiza;
   3. utila pentru metale pure, nu atāt de utila pentru aliaje;
   4. o metoda cantitativa de analiza;
   
   
2. Cānd circuitul electric este īnchis:
   1. elementele din metalele sunt trecute īn solutie sub forma de cationi;
   2. disocierea apei este inhibata;
   3. cationii din solutie sunt trecuti īn proba ca metale;
   4. curent electric trece prin proba si hārtie;
   
   
3. Hartia necesita ca īnainte de analiza probei:
   1. sa fie arsa;
   2. sa fie taiata īn bucati mici;
   3. sa fie acidulata;
   4. sa fie testata;
   
   
4. Cānd plumbul este identificat:
   1. reactiile utilizate īn mod clar ii indica prezenta;
   2. apare un complex rosu-brun;
   3. ar trebui sa fie luate masuri de precautie pentru deseurile toxice eliminate;
   4. apare un complex violet;
   5. sunt utilizate substante periculoase;
   
   
5. Cānd aluminiu este identificat:
   1. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un indiciu mai selectiv cu privire la prezenta aluminiului;
   2. folosirea alizarinei, īmpreuna cu hidroxidul de amoniu ofera un complex colorat rosu;
   3. prezenta altor ioni poate produce un rezultat adevarat pozitiv;
   4. exista multe reactii posibile de identificare;
   
   

FINAL TEST AT LABORATORY
Qualitative analysis of metals and alloys

1. When aluminum is identified:
   1. is identified as Al¹⁺ cation;
   2. the presence of other ions may produce a false positive outcome;
   3. the presence of other ions may produce a false negative outcome;
   4. only one identification reaction is possible;
   
   
2. The paper requires before analysis of the sample:
   1. to be acidified;
   2. to be moistened with an electrolyte;
   3. to be burned;
   4. to measure its surface;
   
   
3. When lead is identified:
   1. a red-brown complex appears;
   2. a yellow complex appears;
   3. a heat release is observed;
   4. interference of other ions may affect the outcome;
   
   
4. Why moisten the paper with solution of sodium nitrate?
   1. to have something to do in the laboratory;
   2. for the paper to work as isolator;
   3. to be cut easily with scissors;
   4. for stopping after a while the chemical reaction that takes place;
   
   
5. This method of analysis of metals and alloys is:
   1. too ancient to be used today in the laboratory;
   2. useful for both metals and alloys;
   3. not useful for both metals and alloys;
   4. a destructive method of analysis;
   
   

TEST DE FINAL DE LABORATOR
Analiza calitativa a metalelor si aliajelor

1. Cānd aluminiu este identificat:
   1. este identificat ca cationul Al¹⁺;
   2. prezenta altor ioni poate produce un rezultat fals pozitiv;
   3. prezenta altor ioni poate produce un rezultat fals negativ;
   4. doar o reactie de identificare este posibila;
   5. exista multe reactii posibile de identificare;
   
   
2. Hartia necesita ca īnainte de analiza probei:
   1. sa fie acidulata;
   2. sa fie umezita cu un electrolit;
   3. sa fie arsa;
   4. sa i se masoare suprafata;
   5. sa fie testata;
   
   
3. Cānd plumbul este identificat:
   1. apare un complex rosu-brun;
   2. apare un complex galben;
   3. se observa o eliberare de caldura;
   4. interferenta altor ioni poate afecta rezultatul;
   5. apare un complex violet;
   
   
4. De ce umezim hārtia cu solutie de azotat de sodiu?
   1. pentru a avea ceva de a face īn laborator;
   2. pentru ca hartia sa actioneze ca izolator;
   3. sa fie taiat cu usurinta cu foarfeca;
   4. pentru oprirea dupa un timp reactiei chimice care are loc;
   
   
5. Aceasta metoda de analiza de metale si aliaje este:
   1. prea veche pentru a fi utilizata īn prezent īn laborator;
   2. utila atāt pentru metale si aliaje;
   3. nu este utila nici pentru metale nici pentru aliaje;
   4. o metoda distructiva de analiza;
   5. o metoda cantitativa de analiza;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The density of the solutions depends on:
   1. time elapsed since were prepared;
   2. pressure;
   3. quantity;
   4. provider;
   
   
2. In the calculations:
   1. are necessary to take the results imediatly after these are available from others;
   2. are necessary to use some formulas expressing in different ways the concentration;
   3. are necessary to take some information from reagent bottles;
   4. are necessary to establish the coefficients of the chemical reaction;
   
   
3. Reactions between acids and bases:
   1. always have as a consequence the formation of a quantity of water;
   2. are all exothermic, being therefore dangerous outside of the laboratory;
   3. have as a consequence the dissolution of a salt;
   4. are always fast, taking place almost instantaneously;
   
   
4. The indicator should be added:
   1. to provide a color change at equivalence point;
   2. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   3. to indicate our safety limits when we dealt with chemicals;
   4. only at the suggestion of the supervisor;
   
   
5. When a chemical reaction is balanced, following should be considered:
   1. all glassware should be clean before and after conducting the experiment;
   2. the liquid in the burette should be at the same level before and after conducting the experiment;
   3. the principle of the conservation of the volume;
   4. the principle of the conservation of the number of atoms for each element;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Densitatea solutiilor depinde de:
   1. timpul scurs de cand au fost pregatite;
   2. presiune;
   3. cantitate;
   4. furnizor;
   
   
2. In calcule:
   1. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   2. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   3. este necesar a se lua unele informatii de pe sticlele de reactivi;
   4. este necesara stabilirea coeficientilor reactiei chimice;
   5. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   
   
3. Reactiile īntre acizi si baze:
   1. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   2. sunt toate exoterme, fiind, prin urmare, īn afara laboratorului periculoase;
   3. au drept consecinta dizolvarea unei sari;
   4. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   5. au ca efect schimbarea culorii unei solutii;
   
   
4. Trebuie adaugat indicatorul:
   1. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   2. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   3. pentru a indica limitele noastre de siguranta, atunci cānd ne ocupam cu substante chimice;
   4. numai la sugestia supraveghetorului;
   5. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   
   
5. 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. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   3. principiul conservarii volumului;
   4. principiul conservarii numarul de atomi pentru fiecare element;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The following chemical reactions were used in the experiments:
   1. H₂O + CO₂ -> H₂CO₃
   2. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   4. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   
   
2. The density of the solutions depends on:
   1. pressure;
   2. temperature;
   3. time elapsed since were prepared;
   4. quantity;
   
   
3. The equivalence point is:
   1. used to balance the equation;
   2. the point in which a reactive should be added in the burette;
   3. the point in which a reactive is fully consumed in the reaction;
   4. the point in which a reactive should be added in the reaction flask;
   
   
4. Reactions between acids and bases:
   1. are rarely useful, and even rarely used;
   2. always have as a consequence the formation of a quantity of water;
   3. have as effect the change of the color of a solution;
   4. are always fast, taking place almost instantaneously;
   
   
5. A redox process:
   1. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. involves a transfer of electrons from one atom or group of atoms to another;
   3. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. involves changing of the oxidation states of some participants to the reaction;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. H₂O + CO₂ -> H₂CO₃
   2. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   4. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   
   
2. Densitatea solutiilor depinde de:
   1. presiune;
   2. temperatura;
   3. timpul scurs de cand au fost pregatite;
   4. cantitate;
   5. concentratie;
   
   
3. Punctul de echivalenta este:
   1. folosit pentru a echilibra ecuatia;
   2. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   3. punctul īn care un reactiv este consumat complet īn reactie;
   4. punctul īn care ar trebui sa fie adaugat un reactiv īn balonul de reactie;
   
   
4. Reactiile īntre acizi si baze:
   1. sunt rareori utile, si chiar mai rar utilizate;
   2. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   3. au ca efect schimbarea culorii unei solutii;
   4. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   
   
5. Un proces redox:
   1. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   2. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   3. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   4. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The following chemical reactions were used in the experiments:
   1. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   2. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   3. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
2. Reactions between acids and bases:
   1. have as effect the change of the color of a solution;
   2. are rarely useful, and even rarely used;
   3. always have as a consequence the formation of a quantity of water;
   4. have as a consequence the dissolution of a salt;
   
   
3. In the calculations:
   1. are necessary to take the results imediatly after these are available from others;
   2. are necessary to draw the tables in our notebooks after completing of the experiment;
   3. are necessary to discuss with our colleagues;
   4. are necessary to use some formulas expressing in different ways the concentration;
   
   
4. When a chemical reaction is balanced, following should be considered:
   1. all glassware should be clean before, after and during the experiment;
   2. the principle of the conservation of the volume;
   3. the principle of the conservation of the energy;
   4. all glassware should be clean before and after conducting the experiment;
   
   
5. A redox process:
   1. is always fast and safe;
   2. involves a transfer of electrons from one atom or group of atoms to another;
   3. involves changing of the aggregation states of some participants to the reaction;
   4. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   2. KMnO₄ + NaOH -> Na₂MnO₄ + KOH
   3. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
2. Reactiile īntre acizi si baze:
   1. au ca efect schimbarea culorii unei solutii;
   2. sunt rareori utile, si chiar mai rar utilizate;
   3. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   4. au drept consecinta dizolvarea unei sari;
   5. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   
   
3. In calcule:
   1. este necesar sa luam rezultatele imediat ce acestea devin disponibile de la colegii nostrii;
   2. este necesar sa desenam tabelele in caiete dupa finalizarea experimentului;
   3. este necesar sa discutam cu colegii;
   4. este necesar sa utilizam unele formule care exprima īn moduri diferite concentratia;
   
   
4. Cānd o reactie chimica este echilibrat, ar trebui sa fie luate īn considerare urmatoarele:
   1. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   2. principiul conservarii volumului;
   3. principiul conservarii energiei;
   4. toate sticlariile trebuie sa fie curat īnainte si dupa efectuarea experimentului;
   
   
5. Un proces redox:
   1. este īntotdeauna rapid si sigur;
   2. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   3. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   4. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   

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. all glassware should be clean before, after and during the experiment;
   3. the principle of the conservation of the number of atoms for each element;
   4. the principle of the conservation of the volume;
   
   
2. Reactions between acids and bases:
   1. are rarely useful, and even rarely used;
   2. have as a consequence the dissolution of a salt;
   3. always have as a consequence the formation of a quantity of water;
   4. are always fast, taking place almost instantaneously;
   
   
3. The equivalence point is:
   1. something rarely encountered in chemistry;
   2. indicated when a color change is observed into the solution;
   3. the point in which a reactive should be added in the burette;
   4. used to balance the equation;
   
   
4. A redox process:
   1. is considered to be the following one: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. is considered to be the following one: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. involves changing of the aggregation states of some participants to the reaction;
   4. involves a transfer of electrons from one atom or group of atoms to another;
   
   
5. 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 in special cases, when the burette is graded from its bottom to its top;
   4. in small quantities, to avoid the errors in observations and in calculations;
   
   

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. toate sticlariile trebuie sa fie curat īnainte, dupa, si īn timpul experimentului;
   3. principiul conservarii numarul de atomi pentru fiecare element;
   4. principiul conservarii volumului;
   5. lichidul din biureta ar trebui sa fie la acelasi nivel, īnainte si dupa efectuarea experimentului;
   
   
2. Reactiile īntre acizi si baze:
   1. sunt rareori utile, si chiar mai rar utilizate;
   2. au drept consecinta dizolvarea unei sari;
   3. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   4. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   5. au ca efect schimbarea culorii unei solutii;
   
   
3. Punctul de echivalenta este:
   1. ceva rar īntālnit īn chimie;
   2. indicat atunci cānd o schimbare de culoare se observa īn solutie;
   3. punctul īn care ar trebui sa fie adaugat un reactiv īn biureta;
   4. folosit pentru a echilibra ecuatia;
   5. punctul īn care un reactiv este consumat complet īn reactie;
   
   
4. Un proces redox:
   1. este considerat a fi urmatorul: (COOH)₂ + NaOH -> (COONa)₂ + H₂O
   2. este considerat a fi urmatorul: KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   3. implica schimbarea a starilor de agregare ale unor participanti la reactie;
   4. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   5. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   
   
5. 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 īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   4. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   
   

FINAL TEST AT LABORATORY
Study of chemical reactions

1. The following chemical reactions were used in the experiments:
   1. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. H₂O + CO₂ -> H₂CO₃
   4. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
2. Titration as a laboratory operation involves:
   1. a standard or referential reactive;
   2. a salt solution;
   3. a mass measurement;
   4. a volume measurement;
   
   
3. The indicator should be added:
   1. to be able to use the chemical reaction for the calculation of corresponding quantities of reactives;
   2. to provide a color change at equivalence point;
   3. in large quantities, according to the principle 'only size matters';
   4. in small quantities, to avoid the errors in observations and in calculations;
   
   
4. Reactions between acids and bases:
   1. always have as a consequence the formation of a quantity of water;
   2. have as effect the change of the color of a solution;
   3. are always fast, taking place almost instantaneously;
   4. are rarely useful, and even rarely used;
   
   
5. A redox process:
   1. occurs only when we mix wrong substances in the laboratory;
   2. involves a transfer of electrons from one atom or group of atoms to another;
   3. is considered to be the following one: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. involves changing of the oxidation states of some participants to the reaction;
   
   

TEST DE FINAL DE LABORATOR
Studiul reactiilor chimice

1. Urmatoarele reactii chimice au fost folosite īn experimente:
   1. KMnO₄ + H₂SO₄ -> K₂SO₄ + MnSO₄ + H₂O
   2. H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   3. H₂O + CO₂ -> H₂CO₃
   4. KMnO₄ + (COOH)₂ + H₂SO₄ -> K₂SO₄ + MnSO₄ + CO₂ + H₂O
   
   
2. Titrarea ca o operatiune de laborator implica:
   1. un standard sau reactiv de referinta;
   2. o solutie de sare;
   3. masurarea masei;
   4. masurarea volumului;
   
   
3. Trebuie adaugat indicatorul:
   1. pentru a putea utiliza reactia chimica in calculul cantitatilor de reactivi corespunzatoare;
   2. pentru a oferi o schimbare de culoare la punctul de echivalenta;
   3. īn cantitati mari, īn conformitate cu principiul "doar dimensiunea conteaza";
   4. īn cantitati mici, pentru a evita erorile īn observatii si īn calculele;
   5. numai īn cazuri speciale, atunci cānd este biureta gradata de jos in sus;
   
   
4. Reactiile īntre acizi si baze:
   1. au īntotdeauna drept consecinta formarea unei cantitati de apa;
   2. au ca efect schimbarea culorii unei solutii;
   3. sunt īntotdeauna rapide, avānd loc aproape instantaneu;
   4. sunt rareori utile, si chiar mai rar utilizate;
   
   
5. Un proces redox:
   1. apare numai atunci cānd se amesteca substante gresit īn laborator;
   2. implica un transfer de electroni de la un atom sau grup de atomi la altul;
   3. este considerat a fi urmatorul: H₂SO₄ + NaOH -> Na₂SO₄ + H₂O
   4. implica schimbarea a starilor de oxidare ale unor participanti la reactie;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. We may say the followings:
   1. water is a good polar solvent;
   2. water is good for drinking, it is nothing to be analysed;
   3. purification of the water may include chemical processes;
   4. purification of the water may include physical processes;
   
   
2. In the laboratory were analyzed:
   1. the solubility of the water;
   2. the softness of the water;
   3. the color of the water;
   4. the boiling point of the water;
   
   
3. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   3. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   
   
4. In the laboratory the water were:
   1. complexed by using EDTA titrimetric method;
   2. acidified for drinking purposes;
   3. softened using the resin column;
   4. hardened using the resin column;
   
   
5. For a water sample following measures may be quantitatively expressed:
   1. total alkalinity;
   2. hardness;
   3. purity;
   4. mineral acidity;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Putem spune urmatoarele:
   1. apa este un solvent polar bun;
   2. apa este buna pentru consum, nu este nimic de a fi analizat;
   3. purificarea apei poate include procese chimice;
   4. purificarea apei poate include procedee fizice;
   
   
2. Īn laborator au fost analizate:
   1. solubilitatea apei;
   2. moliciunea apei;
   3. culoarea apei;
   4. punctul de fierbere al apei;
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   3. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   4. NaOH + Cl⁺ -> NaCl + HO⁺
   5. NaOH + Cl^- -> NaCl + HO^-
   
   
4. In laborator apa au fost:
   1. complexata prin metoda titrimetrica EDTA;
   2. acidulata pentru baut;
   3. dedurizata folosind coloana de rasina;
   4. calita folosind coloana de rasina;
   
   
5. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. alcalinitate totala;
   2. duritate;
   3. puritate;
   4. aciditate minerala;
   5. culoare;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. EDTA is used:
   1. for complexing of Na¹⁺ and K¹⁺ ions;
   2. for complexing of Ca²⁺ and Mg²⁺ ions;
   3. for safety precautions purposes;
   4. for indication of the equilibrium point in the reaction;
   
   
2. In the laboratory were analyzed:
   1. the hardness of the water;
   2. the alkalinity of the water;
   3. the concentration of the water;
   4. the color of the water;
   
   
3. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   2. HCl + HO^- -> H₂O + Cl^-
   3. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   4. HCl + CO₃^2- -> HCO₃^- + Cl^-
   
   
4. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   2. NaOH + Cl^- -> NaCl + HO^-
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   
   
5. We may say the followings:
   1. purification of the water may include biological processes;
   2. when water contains dissolved minerals and gases is bad for drinking;
   3. natural water may contain organic matter and living organisms;
   4. water is pure only when is taken from a good freshwater mountain stream;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. EDTA este utilizat:
   1. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   2. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   3. ca masura de siguranta;
   4. pentru indicarea punctului de echilibru īn reactie;
   5. pentru reīncarcarea rasinii la dedurizarea apei;
   
   
2. Īn laborator au fost analizate:
   1. duritatea apei;
   2. alcalinitatea apei;
   3. concentratia apei;
   4. culoarea apei;
   5. temperatura apei;
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   2. HCl + HO^- -> H₂O+Cl^-
   3. HCl + CO₃²⁺ -> HCO₃⁺ + Cl⁺
   4. HCl + CO₃^2- -> HCO₃^- + Cl^-
   5. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   2. NaOH + Cl^- -> NaCl + HO^-
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   
   
5. Putem spune urmatoarele:
   1. purificarea apei poate include procese biologice;
   2. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   3. apa naturala poate contine materie organica si organisme vii;
   4. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. color;
   2. purity;
   3. mineral acidity;
   4. total alkalinity;
   
   
2. EDTA is used:
   1. for safety precautions purposes;
   2. for indication of the equilibrium point in the reaction;
   3. for recharging of the resin for water softening;
   4. for complexing of Ca²⁺ and Mg²⁺ ions;
   
   
3. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + NO₃^- -> NaNO₃ + HO^-
   2. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   
   
4. We may say the followings:
   1. when water contains dissolved minerals and gases is bad for drinking;
   2. water is a good polar solvent;
   3. purification of the water may include chemical processes;
   4. purification of the water may include biological processes;
   
   
5. Following reactions may tok place when we analyse a sample of water for partial alkalinity:
   1. HCl + HO^- -> H₂O + Cl^-
   2. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   3. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. culoare;
   2. puritate;
   3. aciditate minerala;
   4. alcalinitate totala;
   
   
2. EDTA este utilizat:
   1. ca masura de siguranta;
   2. pentru indicarea punctului de echilibru īn reactie;
   3. pentru reīncarcarea rasinii la dedurizarea apei;
   4. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   5. pentru complexarea ionilor de Na^{1 +}si K^{1 +};
   
   
3. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + NO₃^- -> NaNO₃ + HO^-
   2. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   3. NaOH + Cl⁺ -> NaCl + HO⁺
   4. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   5. NaOH + SO₄^2- -> Na₂SO₄ + HO^-
   
   
4. Putem spune urmatoarele:
   1. atunci cānd apa contine minerale dizolvate si gaze este rea pentru baut;
   2. apa este un solvent polar bun;
   3. purificarea apei poate include procese chimice;
   4. purificarea apei poate include procese biologice;
   5. apa este buna pentru consum, nu este nimic de a fi analizat;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru alcalinitate partiala:
   1. HCl + HO^- -> H₂O+Cl^-
   2. HCl + PO₄³⁺ -> HPO₄²⁺ + Cl⁺
   3. NaOH + Fe²⁺ -> Fe(OH)₂ + Na⁺
   4. HCl + HO⁺ -> H₂O + Cl⁺
   
   

FINAL TEST AT LABORATORY
Water analysis

1. We may say the followings:
   1. water is a good polar solvent;
   2. water is good for drinking, it is nothing to be analysed;
   3. natural water may contain organic matter and living organisms;
   4. water is pure only when is taken from a good freshwater mountain stream;
   
   
2. In the laboratory the water were:
   1. hardened using the resin column;
   2. acidified for drinking purposes;
   3. softened using the resin column;
   4. biologically purified using the resin column;
   
   
3. EDTA is used:
   1. for complexing of Ca²⁺ and Mg²⁺ ions;
   2. for safety precautions purposes;
   3. for indication of the equilibrium point in the reaction;
   4. as reagent for determining the hardness of the water;
   
   
4. For a water sample following measures may be quantitatively expressed:
   1. color;
   2. mineral acidity;
   3. hardness;
   4. total acidity;
   
   
5. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   2. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   3. NaOH + HCOO^- -> HCOONa + HO^-
   4. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Putem spune urmatoarele:
   1. apa este un solvent polar bun;
   2. apa este buna pentru consum, nu este nimic de a fi analizat;
   3. apa naturala poate contine materie organica si organisme vii;
   4. apa este pura doar atunci cānd este luata dintr-un bun izvor de munte de apa dulce;
   
   
2. In laborator apa au fost:
   1. calita folosind coloana de rasina;
   2. acidulata pentru baut;
   3. dedurizata folosind coloana de rasina;
   4. purificata biologic utilizānd coloana de rasina;
   5. complexata prin metoda titrimetrica EDTA;
   
   
3. EDTA este utilizat:
   1. pentru complexarea ionilor de Ca^{2 +}si Mg^{2 +};
   2. ca masura de siguranta;
   3. pentru indicarea punctului de echilibru īn reactie;
   4. ca reactiv pentru determinarea duritatii apei;
   
   
4. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. culoare;
   2. aciditate minerala;
   3. duritate;
   4. aciditate totala;
   5. puritate;
   
   
5. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CH₃COO⁺ -> CH₃COONa + HO⁺
   2. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   3. NaOH + HCOO^- -> HCOONa + HO^-
   4. NaOH + CO₃^2- -> HCO₃^- + HO^-
   5. NaOH + CH₃COO^- -> CH₃COONa+HO^-
   
   

FINAL TEST AT LABORATORY
Water analysis

1. For a water sample following measures may be quantitatively expressed:
   1. total acidity;
   2. purity;
   3. permanent alkalinity;
   4. color;
   
   
2. Following reactions may tok place when we analyse a sample of water for total acidity:
   1. NaOH + CH₃COO^- -> CH₃COONa + HO^-
   2. NaOH + CO₃^2- -> NaHCO₃^- + HO^-
   3. NaOH + HCOO^- -> HCOONa + HO^-
   4. NaOH + CO₃²⁺ -> NaHCO₃⁺ + HO⁺
   
   
3. In the laboratory the water were:
   1. alkalinized for drinking purposes;
   2. complexed by using EDTA titrimetric method;
   3. biologically purified using the resin column;
   4. hardened using the resin column;
   
   
4. Following reactions may tok place when we analyse a sample of water for mineral acidity:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + Cl^- -> NaCl + HO^-
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + NO₃^- -> NaNO₃ + HO^-
   
   
5. We may say the followings:
   1. purification of the water may include chemical processes;
   2. purification of the water may include physical processes;
   3. water is good for drinking, it is nothing to be analysed;
   4. purification of the water may include labeling processes;
   
   

TEST DE FINAL DE LABORATOR
Analiza apei

1. Pentru o proba de apa urmatoarele masuri pot fi exprimate cantitativ:
   1. aciditate totala;
   2. puritate;
   3. alcalinitate permanenta;
   4. culoare;
   5. aciditate minerala;
   
   
2. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate totala:
   1. NaOH + CH₃COO^- -> CH₃COONa+HO^-
   2. NaOH + CO₃^2- -> HCO₃^- + HO^-
   3. NaOH + HCOO^- -> HCOONa + HO^-
   4. NaOH + CO₃²⁺ -> HCO₃⁺ + HO⁺
   
   
3. In laborator apa au fost:
   1. alcalinizeaza pentru baut;
   2. complexata prin metoda titrimetrica EDTA;
   3. purificata biologic utilizānd coloana de rasina;
   4. calita folosind coloana de rasina;
   
   
4. Urmatoarele reactii pot avea loc atunci cānd analizam un esantion de apa pentru aciditate minerala:
   1. NaOH + SO₄²⁺ -> Na₂SO₄ + HO⁺
   2. NaOH + Cl^- -> NaCl + HO^-
   3. NaOH + NO₃⁺ -> NaNO₃ + HO⁺
   4. NaOH + NO₃^- -> NaNO₃ + HO^-
   5. NaOH + Zn²⁺ -> Zn(OH)₂ + Na⁺
   
   
5. Putem spune urmatoarele:
   1. purificarea apei poate include procese chimice;
   2. purificarea apei poate include procedee fizice;
   3. apa este buna pentru consum, nu este nimic de a fi analizat;
   4. purificarea apei poate include procesele de etichetare;
   
   

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

1. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an anion;
   2. always the metal changes its oxidation state;
   3. a gas is released only the corrosion of zinc;
   4. a gas is released at both corrosion of zinc and aluminum;
   
   
2. The aluminum plate:
   1. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   2. was involved in the gravimetric method of corrosion analysis
   3. was involved in the volumetric method of corrosion analysis
   4. the volume is measured before and after immersing it in NaOH;
   
   
3. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. ZnO + CO -> Zn + CO₂
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   
4. The zinc plate:
   1. the mass is measured before and after immersing it in H₂SO₄;
   2. was involved in the volumetric method of corrosion analysis
   3. the volume is measured before and after immersing it in H₂SO₄;
   4. the surface is measured before and after immersing it in H₂SO₄;
   
   
5. Corrosion of metals:
   1. is a beneficial process that shows the stability of metals;
   2. is the protection in time to chemical agents;
   3. can be reduced by electroplating;
   4. is the destruction of metals under the action of external factors;
   
   

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

1. Īn procesele de coroziune studiate:
   1. metalul isi schimba starea de oxidare pentru a deveni un anion;
   2. īntotdeauna metalul isi schimba starea de oxidare;
   3. un gaz este eliberat numai la corodarea zincului;
   4. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   5. metalul isi schimba starea de oxidare pentru a deveni un cation;
   
   
2. Pentru placa de aluminiu:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. volumul se masoara īnainte si dupa imersia īn NaOH;
   
   
3. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Ni -> H₂ + Ni²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. ZnO + CO -> Zn + CO₂
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   5. Fe₂O₃ + CO -> Fe + CO₂
   
   
4. Pentru placa de zinc:
   1. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   4. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   
   
5. Coroziunea metalelor:
   1. este un proces benefic care arata stabilitatea metalelor;
   2. este protectia de durata impotriva agentilor chimici;
   3. poate fi redusa prin galvanizare;
   4. este distrugerea metalelor sub actiunea factorilor externi;
   
   

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

1. Corrosion of metals:
   1. is helping in the process of cleaning the metals surfaces;
   2. may provide useful raw materials for analysis;
   3. can be reduced by passivation;
   4. can be reduced by electroplating;
   
   
2. Which of the following reactions may be called as of corrosion:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. Fe₂O₃ + CO -> Fe + CO₂
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. H⁺ + Ni -> H₂ + Ni²⁺
   
   
3. The aluminum plate:
   1. was degreased in sodium hydroxide solution;
   2. the volume is measured before and after immersing it in NaOH;
   3. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   4. was involved in the gravimetric method of corrosion analysis
   
   
4. In studied corrosion processes:
   1. a gas is released only the corrosion of zinc;
   2. always the metal changes its oxidation state;
   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 corroded in sulfuric solution;
   2. was involved in the volumetric method of corrosion analysis
   3. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   4. the surface 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 de ajutor īn procesul de curatare a suprafetelor metalelor;
   2. poate furniza materii prime utile pentru analiza;
   3. poate fi redusa prin pasivare;
   4. poate fi redusa prin galvanizare;
   5. este protectia de durata impotriva agentilor chimici;
   
   
2. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   2. Fe₂O₃ + CO -> Fe + CO₂
   3. H⁺ + Fe -> H₂ + Fe²⁺
   4. H⁺ + Ni -> H₂ + Ni²⁺
   5. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   
   
3. Pentru placa de aluminiu:
   1. a fost degresata īn solutie de hidroxid de sodiu;
   2. volumul se masoara īnainte si dupa imersia īn NaOH;
   3. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
4. Īn procesele de coroziune studiate:
   1. un gaz este eliberat numai la corodarea zincului;
   2. īntotdeauna metalul isi schimba starea de oxidare;
   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 corodata īn solutie sulfuric;
   2. a fost implicata īn metoda volumetrica de analiza a coroziunii
   3. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   4. suprafata se masoara īnainte si dupa imersia īn H₂SO₄;
   
   

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 degreased in sodium hydroxide solution;
   3. the mass is measured before and after immersing it in NaOH;
   4. the volume is measured before and after immersing it in NaOH;
   
   
2. 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. 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. H⁺ + Fe -> H₂ + Fe²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. ZnO + CO -> Zn + CO₂
   4. Ni(CO)₄ -> Ni + CO
   
   
4. The zinc plate:
   1. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   2. was degreased in sulfuric acid solution;
   3. the volume is measured before and after immersing it in H₂SO₄;
   4. the mass is measured before and after immersing it in H₂SO₄;
   
   
5. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an anion;
   2. always the metal changes its oxidation state;
   3. when a gas is released its volume depends on the amount of metal corroded;
   4. a gas is released at both corrosion of zinc and aluminum;
   
   

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 degresata īn solutie de hidroxid de sodiu;
   3. masa este masurata īnainte si dupa imersia īn NaOH;
   4. volumul se masoara īnainte si dupa imersia īn NaOH;
   5. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
2. Coroziunea metalelor:
   1. este distrugerea metalelor sub actiunea factorilor externi;
   2. este protectia de durata impotriva agentilor chimici;
   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. H⁺ + Fe -> H₂ + Fe²⁺
   2. Al₂O₃ + NaOH -> NaAlO₂
   3. ZnO + CO -> Zn + CO₂
   4. Ni(CO)₄ -> Ni + CO
   
   
4. 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. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   4. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   
   
5. Īn procesele de coroziune studiate:
   1. metalul isi schimba starea de oxidare pentru a deveni un anion;
   2. īntotdeauna metalul isi schimba starea de oxidare;
   3. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   4. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   
   

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

1. The aluminum plate:
   1. was corroded in sodium hydroxide solution;
   2. the mass is measured before and after immersing it in NaOH;
   3. the surface is measured before and after immersing it in NaOH;
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   
2. Corrosion of metals:
   1. is a beneficial process that shows the stability of metals;
   2. can be reduced by electroplating;
   3. may provide useful raw materials for analysis;
   4. takes place merely from exposure to moisture in air;
   
   
3. In studied corrosion processes:
   1. the metal it changes its oxidation state becoming an anion;
   2. always the metal changes its oxidation state;
   3. a gas is released at both corrosion of zinc and aluminum;
   4. a gas is released only the corrosion of zinc;
   
   
4. The zinc plate:
   1. the volume is measured before and after immersing it in H₂SO₄;
   2. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   3. was involved in the volumetric method of corrosion analysis
   4. was involved in the gravimetric method of corrosion analysis
   
   
5. Which of the following reactions may be called as of corrosion:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. ZnO + CO -> Zn + CO₂
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   

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. masa este masurata īnainte si dupa imersia īn NaOH;
   3. suprafata se masoara īnainte si dupa imersia īn NaOH;
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   
   
2. Coroziunea metalelor:
   1. este un proces benefic care arata stabilitatea metalelor;
   2. poate fi redusa prin galvanizare;
   3. poate furniza materii prime utile pentru analiza;
   4. are loc pur si simplu prin expunerea la umiditate īn aer;
   
   
3. Īn procesele de coroziune studiate:
   1. metalul isi schimba starea de oxidare pentru a deveni un anion;
   2. īntotdeauna metalul isi schimba starea de oxidare;
   3. un gaz este eliberat la ambele coroziuni ale zincului si aluminiului;
   4. un gaz este eliberat numai la corodarea zincului;
   5. metalul isi schimba starea de oxidare pentru a deveni un cation;
   
   
4. Pentru placa de zinc:
   1. volumul se masoara īnainte si dupa imersia īn H₂SO₄;
   2. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   5. a fost corodata īn solutie sulfuric;
   
   
5. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   2. H⁺ + Fe -> H₂ + Fe²⁺
   3. ZnO + CO -> Zn + CO₂
   4. ZnO + H₂SO₄ -> ZnSO₄ + H₂O
   
   

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

1. The aluminum plate:
   1. the volume is measured before and after immersing it in NaOH;
   2. was involved in the gravimetric method of corrosion analysis
   3. was involved in the volumetric method of corrosion analysis
   4. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   
   
2. Which of the following reactions may be called as of corrosion:
   1. H⁺ + Zn -> H₂ + Zn²⁺
   2. ZnO + CO -> Zn + CO₂
   3. H⁺ + Ni -> H₂ + Ni²⁺
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   
   
3. In studied corrosion processes:
   1. when a gas is released its volume depends on the amount of metal corroded;
   2. a gas is released only the corrosion of zinc;
   3. always the metal changes its oxidation state;
   4. a gas is released only the corrosion of aluminum;
   
   
4. The zinc plate:
   1. is expected to have approximately the same mass at the end of the semester as at the beginning of it;
   2. the mass is measured before and after immersing it in H₂SO₄;
   3. was corroded in sulfuric solution;
   4. was involved in the gravimetric method of corrosion analysis
   
   
5. Corrosion of metals:
   1. is the protection in time to chemical agents;
   2. is a beneficial process that shows the stability of metals;
   3. is the destruction of metals under the action of external factors;
   4. can be reduced by passivation;
   
   

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

1. Pentru placa de aluminiu:
   1. volumul se masoara īnainte si dupa imersia īn NaOH;
   2. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   3. a fost implicata īn metoda volumetrica de analiza a coroziunii
   4. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   5. masa este masurata īnainte si dupa imersia īn NaOH;
   
   
2. Care dintre urmatoarele reactii pot fi numite ca fiind de coroziune:
   1. H⁺ + Zn -> H₂ + Zn²⁺
   2. ZnO + CO -> Zn + CO₂
   3. H⁺ + Ni -> H₂ + Ni²⁺
   4. H₂O + HO^- + Al -> H₂ + Al(OH)₄^-
   5. H⁺ + Fe -> H₂ + Fe²⁺
   
   
3. Īn procesele de coroziune studiate:
   1. atunci cānd un gaz este eliberat volumul sau depinde de cantitatea de metal corodat;
   2. un gaz este eliberat numai la corodarea zincului;
   3. īntotdeauna metalul isi schimba starea de oxidare;
   4. un gaz este eliberat numai la corodarea aluminiului;
   
   
4. Pentru placa de zinc:
   1. este de asteptat sa aiba aproximativ aceeasi masa la sfārsitul semestrului ca la īnceputul acestuia;
   2. masa este masurata īnainte si dupa imersia īn H₂SO₄;
   3. a fost corodata īn solutie sulfuric;
   4. a fost implicata īn metoda gravimetrica de analiza a coroziunii
   
   
5. Coroziunea metalelor:
   1. este protectia de durata impotriva agentilor chimici;
   2. este un proces benefic care arata stabilitatea metalelor;
   3. este distrugerea metalelor sub actiunea factorilor externi;
   4. poate fi redusa prin pasivare;
   
   

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

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

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

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

FINAL TEST AT LABORATORY
Nickel corrosion protective electroplating

1. Electrical conductivity of nickel salts solutions:
   1. is improved by salts additions;
   2. is relatively high;
   3. is relatively small;
   4. is reduced by salts additions;
   
   
2. Theoretical mass of nickel deposited is calculated using:
   1. the electrolysis law;
   2. law of mass action;
   3. perfect gas law;
   4. the conservation of the energy law;
   
   
3. The intensity of the current:
   1. affect only the quantity of the nickel deposition;
   2. it depends on the surface of the sample;
   3. is to be calculated after conducting the experiment;
   4. affect only the quality of the nickel deposition;
   
   
4. It is expected to have a mass of nickel deposited:
   1. much lower than the calculated theoretical one;
   2. inversely proportional with the surface of the sample;
   3. inversely proportional with the intensity of the current used;
   4. much higher than the calculated theoretical one;
   
   
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 cathode: O^2- - 2e^- -> O₂⁰
   3. at anode (+), connected with nickel piece, Ni⁰ - 2e^- -> Ni²⁺
   4. at cathode (-), connected with metallic piece, Ni²⁺ + 2e^- -> Ni⁰
   
   

TEST DE FINAL DE LABORATOR
Electrodepunerea nichelului protectiva impotriva coroziunii

1. Conductivitatea electrica a solutiilor de saruri de nichel:
   1. este īmbunatatita prin adaosuri de saruri;
   2. este relativ mare;
   3. este relativ mica;
   4. este redusa prin adaosuri de saruri;
   5. depinde de potentialul sursei utilizate;
   
   
2. Masa teoretica de nichel depus se calculeaza folosind:
   1. legea electrolizei;
   2. legea actiunii maselor;
   3. legea gazelor perfecte;
   4. legea conservarii energiei;
   5. legea solutilor;
   
   
3. Intensitatea curentului:
   1. afecteaza numai cantitatea de nichel depus;
   2. depinde de suprafata probei;
   3. se calculeaza dupa efectuarea experimentului;
   4. afecteaza numai calitatea depunerii nichelului;
   
   
4. Este de asteptat ca masa de nichel depus sa fie:
   1. mult mai mica decāt cea teoretica calculata;
   2. invers proportionala cu suprafata probei;
   3. invers proportionala cu intensitatea curentului utilizat;
   4. mult mai mare decāt cea teoretica calculata;
   
   
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 catod: O^2- - 2e^- -> O₂⁰
   3. la anod (+), īn contact cu piesa de nichel, Ni⁰ - 2e^- -> Ni²⁺
   4. la catod (-), īn contact cu piesa metalica, Ni²⁺ + 2e^- -> Ni⁰