An organic compound (A) of molecular formula C_7H_6Ogives brisk effervescence with Na_2CO_3 . Sodium salt of (A) on treatment with sodalime gives (B) a simplest aromatic hydrocarbon. (B) on reaction with acetylchloride in the presence of anhydrous AlCl_3gives (C) of formula C_8H_8O . (C ) on treatment with conc. nitric acid and conc. sulphuric acid gives (D) of formula C_8H_7NO_3 . Identify A,B,C,D,E and explain the reactions involved.

An organic compound (A) of molecular formula C_7H_6Ogives brisk efferv

1.	An organic compound (A) of molecular formula C_7H_6Ogives brisk effervescence with Na_2CO_3 . Sodium salt of (A) on treatment with sodalime gives (B) a simplest aromatic hydrocarbon. (B) on reaction with acetylchloride in the presence of anhydrous AlCl_3gives (C) of formula C_8H_8O . (C ) on treatment with conc. nitric acid and conc. sulphuric acid gives (D) of formula C_8H_7NO_3 . Identify A,B,C,D,E and explain the reactions involved.
Answer» Solution : (i) (A) gives brisk effervescence with `Na_2CO_3` solution and it MUST be a carboxylic acid. (A) (i) (A) gives brisk effervescence with `Na_2CO_3`solutionand it must be a carboxylic acid. (A) is `C_6H_5COOH`benzoic acid. (ii) Sodium salt of benzoic acid on reaction with SODALIME (decarboxylation) produces benzene as (B)