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  • In the basic medium H2O2 exhibits which of the following reaction? <img alt="\text { (A) } \mathrm{Mn}^{2+} \rightarrow \mathrm{Mn}^{4+}" src="/latex-image/?%5Ctext%20%7B%20%28A%29%20%7D%20%5Cmathrm%7BMn%7D%5E%7B2&plus;%7

In the basic medium H2O2 exhibits which of the following reaction? \text { (A) } \mathrm{Mn}^{2+} \rightarrow \mathrm{Mn}^{4+} (\mathrm{B}) \mathrm{I}_{2} \rightarrow \mathrm{I}^{-} \text { (C) } \mathrm{PbS} \rightarrow \mathrm{PbSO}_{4} Choose the most appropriate answer from the options given below:
Option: 1 A, B only
Option: 2 A only
Option: 3 B only
Option: 4 A, C only

Answers (1)

best_answer

In basic medium, oxidizing action of H2O2

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

In basic medium, reducing action of H2O2

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

In acidic medium, oxidising action of H2O2 , But not in a basic medium.

\mathrm{PbS}(\mathrm{s})+4 \mathrm{H}_{2} \mathrm{O}_{2}(\mathrm{aq}) \rightarrow \mathrm{PbSO}_{4}(\mathrm{~s})+4 \mathrm{H}_{2} \mathrm{O}(\ell)

Therefore, the Correct option is (1)

Posted by

Kuldeep Maurya

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