Which one of the following does not undergo iodoform reaction?

Secondary butyl alcohol

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Iso-propyl alcohol

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Diethyl ketone

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Ethyl alcohol

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Solution

The correct option is A Diethyl ketone
Diethyl ketone does not undergo iodoform reaction as it does not contain methyl keto group.

Methyl keto group is $C H_{3} - C | | O -$ group. Any compound that contains terminal methyl keto group or can be oxidised to methyl keto group can undergo iodoform reaction.

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