The salt whose aqueous solution will turn blue litmus to red is:
ammonium sulphate
sodium acetate
sodium chloride
potassium carbonate

Academic Chemistry NCERT Class 10

Correct Answer: (a) Ammonium sulphate

Explanation: Litmus turns blue to red in acidic conditions, as the aqueous solution of ammonium sulphate produces H₂SO₄ acid (strong acid). Therefore, the solution becomes acidic in nature.

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Updated on: 10-Oct-2022

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