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(B) The iodination of alkanes is a reversible reaction: $CH_4 + I_2 \rightleftharpoons CH_3I + HI$. To drive the reaction in the forward direction,the

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Oxidizing agent

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(B) The iodination of alkanes is a reversible reaction: $CH_4 + I_2 \rightleftharpoons CH_3I + HI$. To drive the reaction in the forward direction,the byproduct $HI$ must be removed. This is achieved by using an oxidizing agent like $HIO_3$ (iodic acid) or $HNO_3$,which oxidizes $HI$ to $I_2$ $(5HI + HIO_3 \rightarrow 3I_2 + 3H_2O)$. Therefore,an oxidizing agent is necessary.

The iodination of alkanes requires the use of an .......... .

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