Question

When a zinc strip is put in copper sulphate solution, after some time, a red brown coating is deposited on the zinc strip. This indicates:

• A. Zinc reacts with air to from red brown coating on its strip.
• B. Zinc strip changes color in water.
• C. Red brown coating on the strip is due to displaced zinc.
• D. Red brown coating on the strip is due to displaced copper.

Answer 1

The correct option is D

Red brown coating on the strip is due to displaced copper.

Zinc being more reactive than copper displaces it from its solution and a red brown coating of copper is deposited on the strip.