Question
Chemistry Question on Chemical Reactions of Aldehydes Ketones and Carboxylic Acids
Two isomers (A) and (B) with Molar mass 184 g/mol and elemental composition C, 52.2%; H, 4.9 % and Br 42.9% gave benzoic acid and p-bromobenzoic acid, respectively on oxidation with KMnO4. Isomer 'A' is optically active and gives a pale yellow precipitate when warmed with alcoholic AgNO3. Isomers 'A' and 'B' are, respectively.
A
B
C
D
Answer
Explanation
Solution
The correct answer is (C) :
moles relative ratio simplest ratio
C 52.2 = 52.2 / 12 = 4.35 → 8.7
H 4.9 = 4.9 / 1 = 4.9 → 9.8
Br 42.9 = 42.9 / 80 = 0.5 → 1
C8H9Br
A is optically active
Fig.
B forms para bromo benzoic acid on reaction with KMnO4.
Fig.