Which one of the following compounds is not u | vedclass

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(C) reducing agent is a substance that loses electrons or increases its oxidation state in a chemical reaction. $CaH_2$ contains hydrogen in the $-1$

Vedclass · Accepted Answer

$HIO_4$

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(C) reducing agent is a substance that loses electrons or increases its oxidation state in a chemical reaction. $CaH_2$ contains hydrogen in the $-1$ oxidation state,which can be oxidized to $0$,acting as a reducing agent. $H_2S$ contains sulfur in the $-2$ oxidation state,which can be oxidized to $0$ or higher,acting as a reducing agent. $HIO_4$ (periodic acid) contains iodine in the $+7$ oxidation state,which is the maximum possible oxidation state for iodine. Therefore,it can only be reduced and acts as a strong oxidizing agent. $PbCl_2$ is generally stable,but $Pb$ is in the $+2$ state,which is the most stable state for lead,making it a poor reducing agent compared to the others,but $HIO_4$ is definitively an oxidizing agent.

Which one of the following compounds is not used as a reducing agent?

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