Which of the following gas is produced when potassium bicarbonate reacts with sulphuric acid?

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H₂

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CO₂

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SO₂

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Solution

The correct option is C
CO₂

Sulphuric acid liberates carbon dioxide from metallic carbonates and bicarbonates. When potassium bicarbonate reacts with sulphuric acid, potassium sulphate, water and carbon dioxide gas is formed.

$2 K H C O_{3} + H_{2} S O_{4} \to K_{2} S O_{4} + 2 H_{2} O + 2 C O_{2} ↑$

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