Redox Reactions & Electrochemistry Test Online MCQs

1. Ostwald’s dilution law is applicable on:

2. For a cell reaction involving two electron change, the standard EMF of the cell is 0.295 V at 2°C. The equilibrium constant of the reaction at 25°C will be

3. Oxidation is:

4. What is the pH of 0.01 m glycine solution? For glycine, K_a₁ = 4.5 x 10⁻³ and K_a₂ = 1.7 x 10⁻¹⁰ at 298 K?

5. The oxidation states of sulphur in S₈,S₂F₂, H₂s respectively, are

6. For reducing one mole of Cr₂O²⁻₇ to Cr³⁺ the charge required is:

7. The oxidation number of Cr in K₂ Cr₂ O₇ is:

8. Which shows electrical conductance?

9. Which is Lewis acid?

10. The emf of Daniell cell at 298 K is E₁’ Zn|ZnSO₄(0.01 M)||CuSO₄(1.0 M)| Cu When the concentration of ZnSO₄ is 1.0 M and that of CuSO₄ is 0.01 M, the emf changed to E₂ What is the relation between E₁ and E₂?

11. Which of the following statements is true for the electrochemical Daniel cell?

12. In the following chemical reaction: Ag₂O + H₂O+ 2e⁻ →2Ag + 2OH⁻

13. Which cannot displace hydrogen from its compound

14. The oxidation states of iodine in HIO₄, H₃IO₅ and H₅IO₆ are respectively

15. Oxidation number of Os in OsO₄: