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  4. lodoform can be prepared from all except

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Q. lodoform can be prepared from all except

Bihar CECEBihar CECE 2011Aldehydes Ketones and Carboxylic Acids

Solution:

Compounds containing either $CH _{3} \overset{\underset{||}{O}}{C}$ - group or $CH _{3} \underset{\overset{|}{O}H}{C}H-$ group give yellow coloured compound, iodoform, when treated with $I _{2}$ and $NaOH.$
$ CH _{3} C O C H_{3}+3 I_{2}+4 NaOH \rightarrow\underset{\text { iodoform }}{C H I_{3}}+C H_{3} C O O N a+3 H_{2} O+3 N a I$