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Sulphuric Acid

Concentrated ...

Question

Concentrated $H_{2} S O_{4}$ cannot be used to prepare $H B r$ from $N a B r$ because it _______________.

reacts slowly with NaBr

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oxidises HBr

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reduces HBr

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disproportionates HBr

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Solution

The correct option is A oxidises HBr
Concentrated $H_{2} S O_{4}$ cannot be used to prepare $H B r$ from $N a B r$ because it oxidises $H B r$ to $B r_{2}$ .

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