Q30: Which reagent will distinguish Benzophenone from acetone? - Aldehydes, Ketones and Carboxylic Acids - Chemistry CUET UG 13-05-2025 Shift 1 Paper | Agrigyan

Acetone ($\text{CH}_3\text{COCH}_3$) contains a methyl ketone group ($\text{CH}_3\text{C}=\text{O}$), so it reacts with iodine and sodium hydroxide ($\text{I}_2/\text{NaOH}$) to give a yellow precipitate of iodoform ($\text{CHI}_3$). Benzophenone ($\text{C}_6\text{H}_5\text{COC}_6\text{H}_5$) lacks a methyl ketone group and does not give this test. Both give negative Tollens' and Fehling's tests and positive 2,4-DNP tests.