In which of the following reactions,hydrogen | vedclass

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(D) An oxidizing agent is a substance that gains electrons and gets reduced in a chemical reaction.In the reaction $PbS + 4H_2O_2 	o PbSO_4 + 4H_2O$:

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$PbS + 4H_2O_2 	o PbSO_4 + 4H_2O$

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(D) An oxidizing agent is a substance that gains electrons and gets reduced in a chemical reaction.In the reaction $PbS + 4H_2O_2 	o PbSO_4 + 4H_2O$:$1$. The oxidation state of sulfur $(S)$ in $PbS$ changes from $-2$ to $+6$ in $PbSO_4$. This is an oxidation process.$2$. The oxidation state of oxygen in $H_2O_2$ changes from $-1$ to $-2$ in $H_2O$. This is a reduction process.Since $H_2O_2$ is reduced,it acts as an oxidizing agent.In options $A$,$B$,and $C$,$H_2O_2$ acts as a reducing agent because the oxygen in $H_2O_2$ is oxidized from $-1$ to $0$ (in $O_2$).

In which of the following reactions,hydrogen peroxide acts as an oxidizing agent?

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