In an accident at a factory, some nitric acid was spilt. Which substance, when added would neutralise the acid without leaving an alkaline solution?

Sodium chloride

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Calcium carbonate

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Water

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Calcium sulphate

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Solution

The correct option is B Calcium carbonate
Calcium carbonate undergoes neutralisation with nitric acid to produce neutral calcium nitrate, which is a salt.
The solution formed is neutral in nature.
$C a C O_{3} + 2 H N O_{3} \to C a (N O_{3})_{2} + H_{2} O + C O_{2}$ .

On the other hand, neutral water, sodium chloride and calcium sulphate would have no effect to reduce the acidic content.

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