The compound which does not respond to iodofo | vedclass

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(C) The iodoform test is positive for compounds containing the $CH_3CO-$ group or the $CH_3CH(OH)-$ group.$A$ $CH_3CHO$ contains a $CH_3CO-$ group,so

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$C_2H_5-CO-C_2H_5$

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(C) The iodoform test is positive for compounds containing the $CH_3CO-$ group or the $CH_3CH(OH)-$ group.$A$ $CH_3CHO$ contains a $CH_3CO-$ group,so it gives a positive test.$B$ $CH_3CH(OH)CH_3$ contains a $CH_3CH(OH)-$ group,so it gives a positive test.$C$ $C_2H_5-CO-C_2H_5$ (pentan-$3$-one) does not contain a $CH_3CO-$ group,so it does not respond to the iodoform test.$D$ $C_6H_5-COCH_3$ (acetophenone) contains a $CH_3CO-$ group,so it gives a positive test.

The compound which does not respond to iodoform test is

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