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  • In the reaction <img alt="3 \mathrm{H}_2 \mathrm{~S}+\mathrm{KMnO}_4+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{K}_2 \mathrm{SO}_4+\mathrm{MnSO}_4+4 \mathrm{~S}" src="https://entrancecorner.onc

In the reaction 3 \mathrm{H}_2 \mathrm{~S}+\mathrm{KMnO}_4+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{K}_2 \mathrm{SO}_4+\mathrm{MnSO}_4+4 \mathrm{~S}, the species that is oxidised and the species that is reduced is:

Option: 1

\mathrm{Reduced: \mathrm{H}_2 \mathrm{~S} \rightarrow \mathrm{S}, Oxidised: \mathrm{KMnO}_4 \rightarrow \mathrm{MnSO}_4}


Option: 2

Reduced: \mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{MnSO}_4, Oxidised: \mathrm{KMnO}_4 \rightarrow \mathrm{MnSO}_4


Option: 3

Reduced: \mathrm{KMnO}_4 \rightarrow \mathrm{MnSO}_4, Oxidised: \mathrm{H}_2 \mathrm{~S} \rightarrow \mathrm{S}


Option: 4

Reduced: \mathrm{KMnO}_4 \rightarrow \mathrm{MnSO}_4, Oxidised: \mathrm{H}_2 \mathrm{SO}_4 \rightarrow \mathrm{MnSO}_4


Answers (1)

best_answer

The oxidation state of Mn in {KMnO}_4 is +7 and goes to +2 in \mathrm{MnSO}_4. The oxidation state of S in H_2S is -2 and goes to 0 in S.

Posted by

vishal kumar

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