(i) For empirical formula of A :
∴ Empirical formula of A = C3H7NO
Empirical formula weight of A = 73
(ii) Molecular weight of acid B can be derived as:
(iii) Acid B is monobasic and thus, B is CnH2n+1 COOH
(iv) Since, B is obtained by the action of A with NaOH followed with hydrolysis, so A is