Two isomers A and B with Molar mass 184 g / mol and elemental compositio C , 52 . 2 % ; H , 49 % and Br 42 . 9 % gave benzoic acid and p - bromobenzoic acid, respectively on oxidation with KMnO 4 . Is

Question

Two isomers A and B with Molar mass 184 g / mol and elemental compositio C , 52 . 2 % ; H , 49 % and Br 42 . 9 % gave benzoic acid and p - bromobenzoic acid, respectively on oxidation with KMnO 4 . Isomer ' A ' is optically active and gives a pale yellow precipitate when warmed with alcoholic AgNO 3 . Isomer ' A ' and ' B ' are, respectively :

TestHub · Accepted Answer

Based on the percentage composition of the elements given the molecular formula of the compound is $C_{8} H_{9} Br$

And the degree of unsaturation or double bond equivalent of $C_{8} H_{9} Br$ is 4.

It is mentioned that A is optically active and gives pale yellow precipitate with ${AgNO}_{3}$ .

Hence, the structures of A and B can be deduced based on the following reactions.

Chemistry - Carboxylic acid and their Derivatives Question with Solution | TestHub

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