Compound (A), C_8 H_9 Br, gives a white precipitate when warmed with alcoholic AgNO_3. Oxidation of (A) gives an acid (B), C_8 H_6 O_4. (B) easily…

Compound (A), $\displaystyle \mathrm{C}_8 \mathrm{H}_9 \mathrm{Br}$, gives a white precipitate when warmed with alcoholic $\displaystyle \mathrm{AgNO}_3$. Oxidation of (A) gives an acid (B), $\displaystyle \mathrm{C}_8 \mathrm{H}_6 \mathrm{O}_4$. (B) easily forms anhydride on heating. Identify the compound (A).