Class 10 · Science · Science

2. Acids, Bases and Salts

Try question 1

A solution turns blue litmus red. The solution is

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Answer and explanation

Answer: C. acidic

Acids turn blue litmus red.

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Try question 2

The pH of pure water at room temperature is about

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Answer and explanation

Answer: B. 7

Pure water is neutral, with pH 7.

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Try question 3

The chemical formula of baking soda is

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Answer and explanation

Answer: B. NaHCO₃

Baking soda is sodium hydrogencarbonate, NaHCO₃; Na₂CO₃ is washing soda (as its decahydrate).

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