Question

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

Answer 1

Explanation:

Your answer is in the attachment

Answer 2

The compound A is C6H5(CH2Br)(CH3)

• This answer must be solved by step by step analysis.
• It is given  C₈H₉Br, gives a white precipitate when  warmed with alcoholic AgNO₃.
• This means , the reactions yield C6H5(CH3)(CH2OR) and the AgBr is precipitated down.
• Further given the A gives an C8H6O4 acid on oxidation. i.e it gives Phthalic acid.
• We know Phthalic acid easily forms Phthalic Anhydride on heating.
• Therfore we can reverse conclude that compound A is C6H5(CH2Br)(CH3)