Question

A salt is made of bivalent ions $X$ and $Y$, each of which is capable of decolorizing acidified $KMn{O}_4$ solution. The salt is likely to be:

• A. stannic chloride.
• B. ferric sulphate.
• C. ferrous sulphate.
• D. ferrous oxalate.

Answer 1

The correct option is D ferrous oxalate.

Ferrous oxalate is capable of decolorizing acidified $KMn{O}_4$ solution.

Acidified $KMn{O}_4$ is an oxidizing agent. It will oxidize the oxalate ions into carbon dioxide. In the process, it will decolorize because of the reduction of the violet permanganate ions into colorless manganous ions.

Option (D) is correct.