Which of the following does not give iodoform reaction ?

C H_{3} C H_{2} C H_{2} O H

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C H_{3} O H

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C H_{3} C H O

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P h C O C H_{3}

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Solution

The correct options are
A $C H_{3} O H$
B $C H_{3} C H_{2} C H_{2} O H$
$C H_{3} C H O$ and $P h C O C H_{3}$ contains methyl keto groups. Hence, they give an iodoform reaction.

$C H_{3} C H_{2} C H_{2} O H$ and $C H_{3} O H$ do not contain methyl keto group. Also, they cannot be oxidized to methyl ketones. Hence, they do not give iodoform reaction.

Hence, the correct options are $A$ and $B$

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