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Question

Name the gas that can readily decolourise acidified KMnO₄ solution :

Options

A.

SO₂

B.

NO₂

C.

P₂O₅

D.

CO₂

Solution

${K M n O_{4} +}_{(O . A .)}^{+ 7} {S O_{2}}_{(R . A .)}^{+ 4} \to \underset{C o l o u r l e s s}{M n S O_{4}} + H_{2} S O_{4} + K_{2} S O_{4}$

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