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

(a) sulphuric acid (b) citric acid

Question 22.
Which of the following is not a mineral acid?

(a) Hydrochloric acid
(b) Citric acid
(c) Sulphuric acid
(d) Nitric acid

The acid produced naturally in our stomach is :

(a) acetic acid

(b) citric acid

(d) sulphuric acid

S O_{2}

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