Electrochemistry Test Online MCQs

1. The SPR values of three elements A, B and C are +2.37V; -1.85V and -1.36V respectively. So the order of their reducing power will be:

2. At infinite dilution of an electrolyte, the equivalent conductance of cations and anions are:

3. For reducing 1 mole of ferrous ions to iron the number of faradays of electricity required will be:

4. Voltaic cell stops functioning after sometimes because there is:

5. In the cell Cu; Cu⁺⁺ || Ag⁺ ; Ag electrons will flow from:

6. On passing electricity through copper sulphate solution, when platinum anode is used:

7. During discharge in the case of lead storage batteries density of sulphuric acid:

8. To obtain 2.70 of silver (at. Mass 108) from an aqueous solution of AgNO₃ it is required to pass:

9. One mole of electrons is same as:

10. Which of the following metals when coupled will give maximum e.m.f. for a voltaic cell.

11. The numbers of faradays required to liberate 1 mole of any element tells about:

12. The compound commonly used as electrolyte in lead storage batteries is:

13. Salt Bridge is used because it:

14. More electropositive elements have more:

15. Will tin displace lead from an aqueous solution of lead bromide?

16. It is impossible to measure the actual voltage of any half cell by itself because:

17. In the cell, Cu ; Cu⁺⁺ || Ag⁺ ; Ag

18. Aqueous solution of HCl conducts electricity because it:

19. Is the reaction 2Al + 3Fe²⁺  2Al³⁺  3Fe possible?

20. Four elements A, B, C and D have the standard oxidation potential values are +2.82 V ; +2.71 V ; +1.67 V and -2.87V. The strongest reducing agent will be: