An optically inactive compound [A] of mollecular formula `C_(4)H_(11)N` on treatement with nitrous acid gives an alcohol [B] which on heating with excess of concentrated sulphuric acid at 440 K gives an alkene [C]. The alkene [C] on treatment with `HBr` gives an optical compound [D] of molecular formula `C_(4)H_(8)Br`. Identify [A], [B], [C] and [D].

An optically inactive compound (A) having molecular formula C_(4)H_(11)H on treatment with HNO_(2) gave an alconot (B) which on heating with conc. H_(2)SO_(4) at 440 k gave an alkene ( C) . ( C) on treatment with HBr gave an optically active compound (D ) having molecular formula C_(4)H_(9)Br Identify (A) ,(B) ,(C) and (D).

An optically inactive compound (A) having molecular formula C_(4)H_(11)H on treatment with HNO_(2) gave an alconot (B) which on heating with conc. H_(2)SO_(4) at 440 k gave an alkene ( C) . ( C) on treatment with HBr gave an optically active compound (D ) having molecular formula C_(4)H_(9)Br Identify (A) ,(B) ,(C) and (D).

An optically inactive compound (A) having molecular formula C_4H_11N on treatment with HNO_2 gave an alcohol (B). (B) on heating at 440 K gave an alkene (C). (C) on treatment with HBr gave an optically active compound (D)having the molecular formula C_4H_9Br . Identify A, B, C and D and write down their structural formulae. Also write equations involved.

An optically inactive compound with molecular formula C_(6)H_(7)N dissolves in dil. HCl and releases N_(2) gas on treatment with nitrous acid. The compound is

An optically active compound A with molecular formula C_8 H_(14) undergoes catalytic hydrogenation to give meso compound, the structure of (A) is :