Chemistry – Class 12 Practice Test 2

1. The rate constant of a reaction is k=3.28 × 10^-4 s^-1. Find the order of the reaction.

2. The standard oxidation potential of Ni/Ni²⁺ electrode is 0.3 V. If this is combined with a hydrogen electrode in acid solution, at what pH of the solution with the measured e.m.f. be zero at 25°C? (Assume [Ni²⁺] = 1M)

3. Which of the following statements is false?

4. Which of the following does not cause rusting of iron?

5. The e.m.f and the standard e.m.f of a cell in the following reaction is 5 V and 5.06 V at room temperature, Ni_(s) + 2Ag⁺_(n) → Ni²⁺_(0.02M) + 2Ag_(s). What is the concentration of Ag⁺ ions?

6. What is the composition of aqua regia?

7. What is the rate law for the reaction C₂H₄ + I₂ → C₂H₄I₂?

8. For a pseudo first-order reaction, what is the unit of the rate of the reaction?

9. Rate of a reaction depends on the ΔH of the reaction.

10. Acid hydrolysis of esters such as CH₃COOC₂H₅ in aqueous solution is an example of a pseudo first-order reaction.