The salt which will not hydrolyse in aqueous solution is :

copper sulphate

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sodium sulphate

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potassium cyanide

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sodium carbonate

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Solution

The correct option is B sodium sulphate
The salt which will not hydrolyse in aqueous solution is sodium sulphate.
Sodium sulphate is a salt of strong base (sodium hydroxide) with strong acid (sulphuric acid). Such salts do not undergo hydrolysis. Their aqueous solutions are neutral with pH equal to 7.

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