Q.

Which acid reacts with metal carbonates to produce a gas that extinguishes a burning splint?

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a

Nitric acid

b

Phosphoric acid

c

Sulfuric acid

d

Hydrochloric acid

answer is A.

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Detailed Solution

When metal carbonate compounds react with sulfuric acid (H2SO4) it produces carbon dioxide gas along with the corresponding salt and water. The carbon dioxide gas is used to extinguish a burning splint.

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