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  4. The number of the given compounds, which can form iodoform with alkali and iodine Diethyl ketone, Acetone, Ethyl chloride, Catechol, Ethanol, Resorcinol, Isopropyl alcohol, Acetophenone, Butanone, Lactic acid ( <img class=img-fluid question-image alt=Question src=https://cdn.tardigrade.in/q/nta/c-zkyfk0aoxw8e.png /> ) and salicylic acid.

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Q. The number of the given compounds, which can form iodoform with alkali and iodine Diethyl ketone, Acetone, Ethyl chloride, Catechol, Ethanol, Resorcinol, Isopropyl alcohol, Acetophenone, Butanone, Lactic acid ( Question ) and salicylic acid.

NTA AbhyasNTA Abhyas 2020Aldehydes Ketones and Carboxylic Acids

Solution:

Catechol, Mandelic acid and $CH_{3}CH_{2}-CO-CH_{2}-CH_{3}\overset{}{ \rightarrow }\text{No yellow ppt}$
Solution aldehydes & ketones having $-\overset{\underset{\left|\right. \left|\right.}{O}}{C}-CH_{3}$ group & $1^\circ $ or $2^\circ $ alcohols having$CH _3- \underset{|}{\overset{|}{C}} - OH$ give yellow ppt $CH _3$ with $I _2 / OH ^{-}$
Her acetone, isopropyl alcohol, ethyl alcohol, Butanone & Acetophenone can from $CHI_{3}$ and rest are not