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  4. Which one among the following alcohols will give iodoform on treatment with iodine and sodium hydroxide?

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Q. Which one among the following alcohols will give iodoform on treatment with iodine and sodium hydroxide?

AMUAMU 2012Alcohols Phenols and Ethers

Solution:

The compounds containing $CH_3-\overset{\underset{|||}{OH}}{C}$ and
$CH_3 -\overset{\underset{|}{OH}}{C} -H$ groups on heating with (aq) $NaOH +I_{2}$
gives iodoform test (yellow ppt of iodoform).
Therefore, the compound, $C _{6} H _{5}- \underset{\overset{|}{OH}}{C} H - CH _{3}$ gives iodoform test.