Potassium sulphite on reacting with hydrochloric acid released _________ gas. $(C l_{2}, S O_{2}, H_{2} S)$ .

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Solution

Potassium sulphite on reacting with hydrochloric acid releases sulphur dioxide ( $S O_{2}$ ) gas.
$K_{2} S O_{3} + 2 H C l \to 2 K C l + H_{2} O + S O_{2}$

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Potassium sulphite on reacting with hydrochloric acid released _________ gas. $(C l_{2}, S O_{2}, H_{2} S)$ .

Potassium sulphite on reacting with hydrochloric acid releases sulphur dioxide ( $S O_{2}$ ) gas.
$K_{2} S O_{3} + 2 H C l \to 2 K C l + H_{2} O + S O_{2}$