Question

Which of the following will decolourise dilute alkaline kmno4 solution? a) CH4 b) C2H4 c) C2H6 d) C3H8

Answer 1

Unsaturated compounds will decolourise dilute alkaline KMnO4 solution.
C2H4 (Ethene) is unsaturated compound and decolorise KMnO4 solution.

Answer 2

Answer: The correct answer of this question is option B or C2H4.

Explanation:

The unsaturated chemical compounds can easily decolourise the dilute alkaline solution of KMnO4.

And the four options mentioned in the question,only for the C2H4 is unsaturated chemical compound because it has carbon-carbon triple bond.

That's why the correct answer of this question is option B.