Concentrated hydrochloric acid is added to manganese oxide to give metal chloride X, water and gas Y. Gas Y is greenish yellow having a sharp pungent choking odour. So, Y is:

H₂

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O₂

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CO₂

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Cl₂

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Solution

The correct option is D
Cl₂

Concentrated hydrochloric acid is added to manganese oxide to give manganese chloride, water and chlorine gas. Chlorine gas is greenish yellow having a sharp pungent choking odour. It turns moist blue litmus paper red.

$M n O_{2} + 4 H C l \to M n C l_{2} + 2 H_{2} O + C l_{2}$

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A greenish yellow gas X is liberated when concentrated hydrochloric acid is heated with manganese dioxide?

M n O_{2}

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