Which of the following will give yellow precipitate with $KOI$?

Cyclopentyl methyl carbinol

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α

-Phenyl ethanol

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A A E

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I_{3} C

- CHO

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Solution

The correct option is C $A A E$
AAE (Aceto acetic ester or ethyl acetoacetate) $C H_{3} C O C H_{2} C O O C_{2} H_{5}$ contains methyl keto group $C H_{3} C O$ . Hence, it can react with $N a O I$ or $K O I$ to give yellow ppt of iodoform $C H I_{3}$ . This reaction is called the haloform reaction. It is given by compounds containing methyl keto group or the compounds that can be easily oxidized to methyl keto group.

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