In the preparation of chlorine from $H C l$ , $M n O_{2}$ acts as:

Oxidising agent

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Reducing agent

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Catalytic agent

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Dehydrating agent

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Solution

The correct option is A Oxidising agent
Chlorine is prepared by heating manganese dioxide with concentrated hydrochloric acid.
$+ 4 M n O_{2} + 4 H - 1 C l \to + 2 M n C l_{2} + {0 C l}_{2} + 2 H_{2} O$

In the above reaction, $M n O_{2}$ oxidises $C l$ from $- 1$ oxidation state to $0$ oxidation state and thus acts as an oxidising agent.

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