Question

An acid which can decolourise purple coloured potassium permanganate solution is
(a) sulphuric acid
(b) citric acid
(c) carbonic acid
(d) hydrochloric acid

Answer 1

Answer:

(b) citric acid

Reaction of purple-coloured potassium permanganate with citric acid is characterised by change in colour from purple to colourless.

Answer 2

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(b) citric acid