Which of the following groups of molecules ac | vedclass

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(C) substance can act as both an oxidising agent and a reducing agent if the central atom is in an intermediate oxidation state.$1$. In $KMnO_4$,$Mn$

Vedclass · Accepted Answer

$HNO_2, SO_2, H_2O_2$

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(C) substance can act as both an oxidising agent and a reducing agent if the central atom is in an intermediate oxidation state.$1$. In $KMnO_4$,$Mn$ is in $+7$ (maximum) oxidation state,so it acts only as an oxidising agent. $O_3$ acts as an oxidising agent. In $SO_3$,$S$ is in $+6$ (maximum) oxidation state,so it acts only as an oxidising agent.$2$. In $HClO_4$,$Cl$ is in $+7$ (maximum) oxidation state,so it acts only as an oxidising agent.$3$. In $HNO_2$,$N$ is in $+3$ oxidation state (intermediate between $-3$ and $+5$). In $SO_2$,$S$ is in $+4$ oxidation state (intermediate between $-2$ and $+6$). In $H_2O_2$,$O$ is in $-1$ oxidation state (intermediate between $-2$ and $0$). Thus,all three can act as both oxidising and reducing agents.$4$. In $HNO_3$,$N$ is in $+5$ (maximum) oxidation state. In $H_2SO_4$,$S$ is in $+6$ (maximum) oxidation state. Thus,they cannot act as reducing agents.Therefore,the correct option is $(C)$.

Which of the following groups of molecules act both as an oxidising agent as well as a reducing agent?

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