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  • Which one of the following reaction indicates the reducing ability of hydrogen peroxide in basic medium?Option: 1 <img alt="\mathrm{HOCl}+\mathrm{H}_

Which one of the following reaction indicates the reducing ability of hydrogen peroxide in basic medium?

Option: 1

\mathrm{HOCl}+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{H}_{3} \mathrm{O}^{+}+\mathrm{Cl}^{-}+\mathrm{O}_{2}


Option: 2

\mathrm{PbS}+4 \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{PbSO}_{4}+4 \mathrm{H}_{2} \mathrm{O}


Option: 3

2 \mathrm{MnO}_{4}^{-}+3 \mathrm{H}_{2} \mathrm{O}_{2} \rightarrow 2 \mathrm{MnO}_{2}+3 \mathrm{O}_{2}+2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{OH}^{-}


Option: 4

\mathrm{Mn}^{2+}+\mathrm{H}_{2} \mathrm{O}_{2} \rightarrow \mathrm{Mn}^{4+}+2 \mathrm{OH}^{-}


Answers (1)

best_answer

When \mathrm{H_{2}O_{2}} acts as a reducing agent, it is itself oxidised and is converted into \mathrm{O_{2}}.

Thus, reducing nature of \mathrm{H_{2}O_{2}} in basic medium is shown in the reaction.

\mathrm{2 \mathrm{MnO}_{4}^{-}+3 \mathrm{H}_{2} \mathrm{O}_{2} \longrightarrow 2 \mathrm{MnO}_{2}+3 \mathrm{O}_{2}+2 \mathrm{H}_{2} \mathrm{O}+2 \mathrm{HH}^{-}}

Hence the correct option is (3)

Posted by

Shailly goel

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