NCERT Exemplar Solutions
Class 10 - Science - CHAPTER 1: Chemical Reactions and Equations - Multiple Choice Questions
Question 6

Question. 6

A dilute ferrous sulphate solution is added to acidified KMnO₄. The purple colour fades and disappears. Which is the correct explanation?

(a)

KMnO₄ is an oxidising agent; it oxidises FeSO₄.

(b)

FeSO₄ acts as an oxidising agent and oxidises KMnO₄.

(c)

Colour disappears due to dilution; no reaction.

(d)

KMnO₄ decomposes in presence of FeSO₄ to a colourless compound.

Acidified KMnO₄ oxidises Fe²⁺ to Fe³⁺; MnO₄⁻ is reduced → decolourisation.