Question

which one of the following ketones will not respond to iodoform test? 1)Methyl isopropyl ketone 2)Ethyl isopropyl ketone 3)Dimethyl ketone 4) 2-hexanone

Answer 1

Ethanol is the only primary alcohol to give the triiodomethane (iodoform) reaction. If "R" is a hydrocarbon group, then you have a secondary alcohol. Lots of secondary alcohols give this reaction, but those that do all have a methyl group attached to the carbon with the -OH group.