Copper can be deposited from acidified copper sulphate and alkaline cuprous cyanide. If the same cur — Electrochemistry Chemistry Question

💡 Solution & Explanation

According to Faraday's First Law, mass deposited is proportional to the equivalent weight. In copper sulphate, copper is $Cu^{2+}$ (eq. wt. = 63.5 / 2 = 31.75). In cuprous cyanide, copper is $Cu^+$ (eq. wt. = 63.5 / 1 = 63.5). Since the equivalent weight in cuprous cyanide is double, twice as much mass of copper will be deposited for the same electrical charge. Therefore, correct answer is B.