Question

Water and a white solid are produced when blue copper(II) sulfate is heated. On the addition of water to the white solid, heat is released and the white solid turns blue.
Select the correct option describing the reaction and the blue copper(II) sulfate?

• A. Reversible and Anhydrous
• B. Non-Reversible and Anhydrous
• C. Non-Reversible and Hydrated
• D. Reversible and Hydrated

Answer 1

The correct option is D Reversible and Hydrated

Hydrated copper(II) sulfate is blue solid which turns white on heating, giving rise to anhydrous copper(II) sulfate. Further addition of water to anhydrous copper(II) sulfate rehydrates the compound, making it blue. Hence, it is reversible reaction.