In which of the following reactions,chlorine | vedclass

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(D) An oxidising agent is a substance that undergoes reduction (gain of electrons or decrease in oxidation state) and causes the oxidation of another

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$(i)$,$(ii)$ and $(iii)$

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(D) An oxidising agent is a substance that undergoes reduction (gain of electrons or decrease in oxidation state) and causes the oxidation of another substance (loss of electrons,addition of oxygen,or removal of hydrogen).In all the given reactions,the oxidation state of chlorine decreases from $0$ (in $Cl_2$) to $-1$ (in $HCl$),which means chlorine is reduced.$(i)$ $CH_3CH_2OH$ loses hydrogen to form $CH_3CHO$,so $Cl_2$ acts as an oxidising agent.$(ii)$ $CH_3CHO$ loses hydrogen to form $CCl_3CHO$,so $Cl_2$ acts as an oxidising agent.$(iii)$ $CH_4$ loses hydrogen to form $CH_3Cl$,so $Cl_2$ acts as an oxidising agent.Therefore,in all these reactions,chlorine acts as an oxidising agent.

In which of the following reactions,chlorine acts as an oxidising agent?
$(i)$ $CH_3CH_2OH + Cl_2 \longrightarrow CH_3CHO + HCl$
$(ii)$ $CH_3CHO + Cl_2 \longrightarrow CCl_3CHO + HCl$
$(iii)$ $CH_4 + Cl_2 \xrightarrow{hv} CH_3Cl + HCl$
The correct answer is

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In which of the following reactions,chlorine acts as an oxidising agent?$(i)$ $CH_3CH_2OH + Cl_2 \longrightarrow CH_3CHO + HCl$$(ii)$ $CH_3CHO + Cl_2 \longrightarrow CCl_3CHO + HCl$$(iii)$ $CH_4 + Cl_2 \xrightarrow{hv} CH_3Cl + HCl$The correct answer is