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  3. A substance ‘X’ changes red litmus solution into blue. ‘X’ is

. A substance ‘X’ changes red litmus solution into blue. ‘X’ is

(a)          citric acid.

(b)          oxalic acid.

(c)           sodium hydroxide.

(d)          hydrochloric acid.

 

Best Answer

(c)

Explanation: Sodium hydroxide is basic in nature. Basic solutions change the colour of red litmus solution into blue.

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