Compound ( A ), C8H9Br gives a white precipitate when warmed with alcoholic AgNO3. Oxidation of (A) gives an acid (B), C8H6O 4. (B) easily forms anhydride on heating. Identify the compound (A).

Question

Compound ( A ), C8H9Br gives a white precipitate when warmed with alcoholic AgNO3. Oxidation of (A) gives an acid (B), C8H6O 4. (B) easily forms anhydride on heating. Identify the compound (A). (A)  (B)  (C)  (D)

Tardigrade Admin · Accepted Answer

Compound A gives a precipitate with alcoholic AgNO,, 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

Q. Compound (A),C8​H9​Br gives a white precipitate when warmed with alcoholic AgNO3​. Oxidation of (A) gives an acid (B), C8​H6​O 4. (B) easily forms anhydride on heating. Identify the compound (A).

Q. Compound $(A), C_{8} H_{9} B r$ gives a white precipitate when warmed with alcoholic $A g N O_{3}$ . Oxidation of $(A)$ gives an acid $(B)$ , $C_{8} H_{6} O$ 4. $(B)$ easily forms anhydride on heating. Identify the compound $(A)$ .