A dibromo derivative (A) on treatment with KCN followed by acid hydrolysis and heating gives a monobasic acid (B), along with liberation of CO_(2). (B)on heating with liquid ammonia followed by treating with Br_(2)//KOH gives © which on treating with NaNO_(2) and HCl at low temperature followed by oxidation gives a monobasic acid (D) having molecular mass 74. Identify A to D.

A dibromo derivative (A) on treatment with KCN followed by acid hydrol

1.	A dibromo derivative (A) on treatment with KCN followed by acid hydrolysis and heating gives a monobasic acid (B), along with liberation of CO_(2). (B)on heating with liquid ammonia followed by treating with Br_(2)//KOH gives © which on treating with NaNO_(2) and HCl at low temperature followed by oxidation gives a monobasic acid (D) having molecular mass 74. Identify A to D.
Answer» Solution : <BR> (ii) `CH_(3)-UNDERSET((B))underset(("Butanoic acid"))(CH_(2)-CH_(2))-COOH underset(Delta)OVERSET(liq. NH_(3))(to) CH_(3)-underset(("Butanamide"))(CH_(2)-CH_(2)-CONH_(2))overset(Br_(2)//KOH)(to) CH_(3)-underset((C))underset((1-"Aminopropane"))(CH_(2)_CH_(2)-NH_(2))` (iii) `underset((C))underset((1-"Aminoprpane"))(CH_(3)-CH_(2)_CH_(2)-NH_(2)) underset("Low temperature")overset(NaNO_(2)//HCl)(to) underset((1-"PROPANOL"))(CH_(3)-CH_(2)-CH_(2))-OHunderset(2(O))overset(K_(2)Cr_(2)O_(7)//H^(+))(to) underset((D))underset(("Propanoic acid"))(CH_(3)-CH_(2)-COOH)`