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Chemical Reactions

An acid which...

Question

An acid which can decolourise purple coloured potassium permanganate solution is :

(a) sulphuric acid (b) citric acid

(c) carbonic acid (d) hydrochloric acid

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Solution

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

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Which of the following is not a mineral acid?

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S O_{2}

passed through acidic potassium permanganate solution (purple in colour) turns it ______.

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(c) Potassium hydroxide reacts with nitric acid
(d) Zinc reacts with sodium hydroxide solution

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