Why should the reaction between manganese dioxide and hydrochloric acid carried out in a fume cupboard?

Manganese causes skin irritations

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Both reactants and products causes itching

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Chlorine gas is poisonous

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None of above

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Solution

The correct option is C Chlorine gas is poisonous
When manganese dioxide is treated with hydrochloric acid, chlorine gas is released as a product which can be poisonous. Hence, the procedure should take place in a fume cupboard to prevent any harmful effects.

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