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NTA Abhyas JEE Main2020ChemistryAldehydes and KetonesPractice

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 ( ) and salicylic acid.

Correct answer

5

Step-by-step solution

Catechol, Mandelic acid and C H 3 C H 2 - C O - C H 2 - C H 3 → No yellow ppt aldehydes & ketones having − C O | | − CH 3 group & 1 ° or 2 ° alcohols having CH 3 − 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

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