An organic compound of molecula formula C_(6)H_(5)O"Na" is heated with CO_(2) at 400 K gives compound (A) of molecular formula C_(7)H_(5)O_(3)Na. Compound (A) on treating with HCl gives (B). B on further reactions wiith NaOH / CaO gives compound (C ) of molecular formula C_(6)H_(6)O which on treatment with nitrous acid at 200 K gives compound (D ). Identify (A), (B) , ( C) and (D) are explain the reactions.

An organic compound of molecula formula C_(6)H_(5)O"Na" is heated with

1.	An organic compound of molecula formula C_(6)H_(5)O"Na" is heated with CO_(2) at 400 K gives compound (A) of molecular formula C_(7)H_(5)O_(3)Na. Compound (A) on treating with HCl gives (B). B on further reactions wiith NaOH / CaO gives compound (C ) of molecular formula C_(6)H_(6)O which on treatment with nitrous acid at 200 K gives compound (D ). Identify (A), (B) , ( C) and (D) are explain the reactions.
Answer» Solution :(i) When a sodium phenoxide is HEATED with carbon dioxide at 400 K under PRESSURE, sodium salicylate is formed. (ii) Sodium salicylate is decomposed hydilute hydrochloric acid, when salicylic acid is formed. (iii) On TREATMENT with NaOH/ CaO sodium salicyalte gives phenol. (IV) Phenol reacts with nitrous acid to give p-nitrosophenol.