An organic compound (A) of molecular formula C_2H_4O_2gives brisk effervescence with Na_2CO_3 . Acetyl chloride reacts with sodium acetate to give C_4H_6O_3as (B). (B) on reaction with PCl_5gives (C) of formula C_2H_2OCI . (C) on reaction with ammonia gives (D) of molecular formula C_2HNO . Identify A,B,C,D and explain the reactions involved.

An organic compound (A) of molecular formula C_2H_4O_2gives brisk effe

1.	An organic compound (A) of molecular formula C_2H_4O_2gives brisk effervescence with Na_2CO_3 . Acetyl chloride reacts with sodium acetate to give C_4H_6O_3as (B). (B) on reaction with PCl_5gives (C) of formula C_2H_2OCI . (C) on reaction with ammonia gives (D) of molecular formula C_2HNO . Identify A,B,C,D and explain the reactions involved.
Answer» Solution : (i) Compound (A) gives BRISK effervescence with `Na_2CO_3`and so it MUST be a carboxylic acid. `CH_3COOH`(acetic acid) is compound A. (II) Acetyl chloride on heating with SODIUM acetate to give acetic ANHYDRIDE as (B)