Question

Assertion :Statement-1: Copper and zinc are obtained by electrolysis of aqueous solution of their sulphates. Reason: Statement-2: Elements that react with water are often extracted from fused melts of their ionic salts.

• A. Statement-1 is true, statement-2 is true and statement-2 is correct explanation for statement-1.
• B. Statement-1 is true, statement-2 is true but statement-2 is not the correct explanation for statement-1
• C. Statement-1 is true, statement-2 is false.
• D. Statement-1 is false, statement-2 is true

Answer 1

The correct option is B Statement-1 is true, statement-2 is true but statement-2 is not the correct explanation for statement-1

Copper and zinc are obtained by electrolysis of aqueous solution of their sulphates as $C{u}^{2+}$ and $Z{n}^{2+}$ ions have lower discharge potential than hydrogen ions and will be liberated at cathode in preference to hydrogen ions. Elements that react with water are often extracted from fused melts of their ionic salts. For example, Na violently reacts with water. It is extracted by electrolysis of fused NaCl in presence of $CaC{l}_2$ and KF (Down process). Thus, statement-1 is true, statement-2 is true but statement-2 is not the correct explanation for statement-1.