Question

Assertion : In electrolysis, the quantity of electricity needed for depositing 1 mole of silver is different from that required for 1 mole of copper.

Reason : The atomic weights of silver and copper are different.

(a) Both A and R are true and R is the correct explanation of A

(b) Both A and R are true but R is not correct explanation of A

(c) A is true but R is false

(d) A and R are false

Answer 1

Correct option (b) Both A and R are true but R is not correct explanation of A

Explanation:

Ag⁺ + e^- → Ag, Cu²⁺ + 2e^- → Cu

For deposition of Ag, 1 mole of electrons is required while for Cu, 2 moles of electrons are required. So . quantity of electricity needed for depositing 1 mole of silver is different from 1 mole of copper.

Answer 2

Option (b) is correct