Q. Compound $A (C_{9} H_{10} O)$ shows positive iodoform test. Oxidation of A with $K M n O_{4} / K O H$ gives acid $B (C_{8} H_{6} O_{4})$ . Anhydride of B is used for the preparation of phenolphthalein. Compound A is :-

2505 285 JEE MainJEE Main 2019Aldehydes Ketones and Carboxylic Acids Report Error

33%

13%

33%

20%

Solution:

Q. Compound A(C9​H10​O) shows positive iodoform test. Oxidation of A with KMnO4​/KOH gives acid B(C8​H6​O4​). Anhydride of B is used for the preparation of phenolphthalein. Compound A is :-