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 molecular weights of silver and copper are different.

Options

A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
C. If (A) is correct, but (R) is incorrect
D. If both (A) and (R) are incorrect.

Answer

B

Explanation

The amount of electricity required for oxidation orreduction depends on stoichiometry of the electrode reaction.Forsilver, `(Ag_(aq)^(+)+e^(-)rarrAg_(s))` one mole ofelectron is required. For copper, `(Cu_(aq)^(2+)+2e^(-)rarrCu_(s))` two moles of electrons are required.