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Question

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


Solution

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

Science
Lakhmir Chemistry 2013
Standard X

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