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

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Nitric acid

Phosphoric acid

Sulfuric acid

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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