When conc. $H_{2} {SO}_{4} reacts with {KMnO}_{4}$ an explosive compounds is obtained which is

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${MnO}_{2}$

${Mn}_{2} O_{7}$

${MnO}_{4}^{2 -}$

None

answer is B.

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Detailed Solution

Mn₂O₇ is a green color liquid which is very reactive and highly explosive. It forms when small amount of concentrated sulphuric acid is added in KMnO₄ solution.

$2 {KMnO}_{4} + 2 H_{2} {SO}_{4} \to {Mn}_{2} O_{7} + H_{2} O + 2 {KHSO}_{4}$

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