Question

Compound (A), C₈H₉Br gives a white precipitate when warmed with alcoholic AgNO₃. Oxidation of (A) gives an acid (B), C₈H₆O₄ . (B) easily forms anyhydride on heating. Identify the compound (A).

Answer 1

Correct Option 

Explanation:

Compound A gives a precipitate with alcoholic AgNO₃ (here white is misprinting because the colour of ppt is light yellow), so it must contains Br in side chain On oxidation, it gives C₈H₆O₄, which shows the presence of two alkyl chains attached directly with the benzene nucleus

Since compound B gives anhydride on heating the two alkyl substituent must occupy adjacent (1, 2) position.