Assertion (A): Zinc displaces copper when it is put in a solution of copper sulphate.
Reason (R): Copper is more reactive than zinc.
Choose the correct option.
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → (A) is correct but (R) is incorrect.
Assertion (A): Zinc displaces copper when it is put in a solution of copper sulphate. — Correct. Zinc reacts with copper sulphate to form zinc sulphate and copper; the blue colour of the solution fades and reddish-brown copper is deposited.
Reason (R): Copper is more reactive than zinc. — Incorrect. In the reactivity series zinc is above copper, so zinc is the more reactive metal; that is the reason it can push copper out of its salt solution.