21 - 30 of 50 Questions
# | Question | Ans |
---|---|---|
21. |
What current in amperes will deposit 2.7g of aluminium in 2 hours? A. 32 B. 8 C. 4 D. 16 Detailed SolutionAl3+ + 3e → Al3 * 96500 → 27 I = 3600 * 2 → 27 I = (2.7/27) * ((3 * 96500)/(3600 * 2)) = 4.025 ≈ 4 |
|
22. |
Ethanoic acid is A. tribasic B. unionizeable C. monobasic D. dibasic |
C |
23. |
C(s) + 2S(g) → CS2(g) A. each of carbon and sulphur has 89 kJ of energy B. both carbon and sulphur contribute 89 kJ of energy C. 89 kJ of energy is released D. 89 kJ of energy is absorbed |
D |
24. |
2SO2(g) + O2(g) ↔ 2SO3(g) A. decreasing the temperature of the system B. Increase the pressure of the system C. The addition of a catalyst to the system D. Increasing the surface area of the vessel Detailed SolutionDecrease in temperature favors in Equilibrium Constant[k] |
|
25. |
3Cu(s) + 8HNO3(aq) 3Cu(NO3)2(aq) + 4H2O(l) + 2NO(g) A. an electron acceptor B. a base C. an oxidizing agent D. a reducing agent |
D |
26. |
When ΔH is negative, a reaction is said to be A. ionic B. reversible C. exothermic D. endothermic |
C |
27. |
As the concentration of an electrolyte reduces, the conductivity A. reduces to zero B. decreases C. increase D. is unaffected |
C |
28. |
In which of the following reactions has the oxidation number of nitrogen increased? A. 2NO(g) + Br2(l) → 2NOBr(l) B. 2NO(g) + O2(g) → 2NO2(g) C. FeSO4(aq) + NO(g) → Fe(NO)SO4(s) D. 2NO(g) + Cl2(g) → 2NOCl(l) |
B |
29. |
NH3(g) + HCl(g) → NH4Cl(s) A. negative B. indeterminate C. positive D. zero |
A |
30. |
Fermentation is the A. breaking down of carbohydrate to glucose B. conversion of sugar to alcohol in the presence of yeast C. breaking down of sugar to carbohydrate D. conversion of alcohol to sugar in the presence of yeast |
B |
21. |
What current in amperes will deposit 2.7g of aluminium in 2 hours? A. 32 B. 8 C. 4 D. 16 Detailed SolutionAl3+ + 3e → Al3 * 96500 → 27 I = 3600 * 2 → 27 I = (2.7/27) * ((3 * 96500)/(3600 * 2)) = 4.025 ≈ 4 |
|
22. |
Ethanoic acid is A. tribasic B. unionizeable C. monobasic D. dibasic |
C |
23. |
C(s) + 2S(g) → CS2(g) A. each of carbon and sulphur has 89 kJ of energy B. both carbon and sulphur contribute 89 kJ of energy C. 89 kJ of energy is released D. 89 kJ of energy is absorbed |
D |
24. |
2SO2(g) + O2(g) ↔ 2SO3(g) A. decreasing the temperature of the system B. Increase the pressure of the system C. The addition of a catalyst to the system D. Increasing the surface area of the vessel Detailed SolutionDecrease in temperature favors in Equilibrium Constant[k] |
|
25. |
3Cu(s) + 8HNO3(aq) 3Cu(NO3)2(aq) + 4H2O(l) + 2NO(g) A. an electron acceptor B. a base C. an oxidizing agent D. a reducing agent |
D |
26. |
When ΔH is negative, a reaction is said to be A. ionic B. reversible C. exothermic D. endothermic |
C |
27. |
As the concentration of an electrolyte reduces, the conductivity A. reduces to zero B. decreases C. increase D. is unaffected |
C |
28. |
In which of the following reactions has the oxidation number of nitrogen increased? A. 2NO(g) + Br2(l) → 2NOBr(l) B. 2NO(g) + O2(g) → 2NO2(g) C. FeSO4(aq) + NO(g) → Fe(NO)SO4(s) D. 2NO(g) + Cl2(g) → 2NOCl(l) |
B |
29. |
NH3(g) + HCl(g) → NH4Cl(s) A. negative B. indeterminate C. positive D. zero |
A |
30. |
Fermentation is the A. breaking down of carbohydrate to glucose B. conversion of sugar to alcohol in the presence of yeast C. breaking down of sugar to carbohydrate D. conversion of alcohol to sugar in the presence of yeast |
B |