1. Tardigrade
  2. Question
  3. Chemistry
  4. Compound (A), C8H9Br gives a yellow precipitate when warmed with alcoholic AgNO3. Oxidation o f (A) gives an acid (B), C8H6O4 . (B) easily forms anhydride on heating. Identify the compound (A).

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. Compound (A), $C_{8}H_{9}Br$ gives a yellow precipitate when warmed with alcoholic $AgNO_{3}$. Oxidation o f (A) gives an acid (B), $C_{8}H_{6}O_{4}$ . (B) easily forms anhydride on heating. Identify the compound (A).

Haloalkanes and Haloarenes

Solution:

Compound A gives a precipitate with alcoholic $AgNO_{3}$, so it must contains Br in side chain. On oxidation, it gives $C_{8}H_{6}O_{4}$, 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. Thus, A must be
image
and the reactions are as follows
image