Question

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 1

The Correct Option is C

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.