An organic compound A burns with a sooty flame. It is negative towards Tollen’s reagent test and positive for Brady’s reagent test. The compound A is (KCET 2011)

Aldehydes and Ketones 32 Since, the given compound A burns with sooty flame, thus, it must be aromatic compound. Again when it reacts with Brady’s reagent(2,4-dinitrophenyl hydrazine solution), it yields orange precipitate but gives no precipitate or silver mirror with Tollen’s reagent. Therefore, A must be an aromatic ketone. Hence, A is acetophenone. 14. Which of the following pairs can be distinguished by sodium hypoiodide? (Kerala CEE 2011) (a) CH3CHO and CH3COCH3 (b) CH3CH2CHO and CH3COCH3 (c) CH3CH3OH and CH3CH2CHOHCH3 (d) CH3OH and CH3CH2CHO CH3CH2CHO and CH3COCH3 can be distinguished