An aliphatic compound 'A' with molecular formula C₂H₃Cl on treatment with AgCN hives two isomeric compounds of unequal amounts with the molecular formula C₃H₃N. The minor of nthese two products on complete reduction with H₂ in the presence of Ni gives a compound 'B' with  molecular formula C₃H₉N. Identify the compounds 'A' , 'B' and write the reactions involved.

Iodomethane reacts with KCN to form a major product 'A' . Compund 'A' on reduction in presence of LiAIH₄ forms a higher amine 'B'. Compound B on treatment with CuCl₂ frms a blue colour complex 'C'. Identify the compounds 'A', 'B'  and 'C' .

An organic compound 'A' having molecular formula C₂H₅O₂N reacts with HNO₂ and gives'B' C₂H₄O₃N₂. On reduction, 'A' gives a compound 'C' on treatment with HNO₂  gives 'D' which gives positive iodoform test. Identify 'A' .

Accomplish the following conversions:
(i) Benzene to m-bromophenol
(ii) Benzoic acid to aniline

Accmplish the following conversions:
(i) Aniline to 2,4,6-tribromofluorobenzene
(ii) Benzyl chloride to 2-phenylethanamine
(iii) Chlorobenzene to p-chloroaniline.

Give plausible explanation for each of the following:
(i) Why are amines less acidic than alcoholes of comparable molecular masses?
(ii) Why do primary amines has higher boiling point than tertiary amines?
(iii) Why are aliphatic amines stronger bases than aromatic amines?

Describe a method for the identification of primary, secondary and tertiary amines. Also write chemical equations of the reactions involved.

Give the structure of A, B and C in the following reactions:
(i) \({ C }_{ 6 }{ H }_{ 5 }{ NO }_{ 2 }\overset { Sn/HCI }{ \longrightarrow } A\overset { NaNO_{ 2 }+HCI }{ \underset { 273K }{ \longrightarrow } } B\overset { { H }_{ 2 }O }{ \longrightarrow } C\)
(ii) \({ C }{ H }_{ 3 }CN\overset { { H }_{ 2 }O/{ H }^{ + } }{ \longrightarrow } A\overset { NH_{ 3 } }{ \underset { \triangle }{ \longrightarrow } } B\overset { { Br }_{ 2 }+KOH }{ \longrightarrow } C\)

Give reasons for the following:
(i) Aniline does not undergo Friedel-Crafts reaction,
(ii) (CH₃)₂NH is more basic than (CH₃)₂N in an aqueous solution,
(ill) Primary amines have higher boiling point than tertiary amines.

A hydrocarbon 'A' (C₄H₈) on reaction with HCI gives a compound 'B' , (C₄H₁₁N). On reacting with NaNO₂ and HCI followed by treatment with water, compound 'C'. Ozonolysis of 'A' gives 2 moles of acetaldehyde. Identify compounds 'A' to 'D' . Explain the reactions involved.

A colourless substance 'A' (C₆H₇N) is sparingly soluble in water and gives a water soluble compound 'B' on treating with mineral acid. On reacting with CHCl₃ and alcoholic potash 'A' produces an obnoxious smell due to the formation of compoung 'C'. Reaction of 'A' with benzenesulphonyl chloride gives compound 'D' which is soluble in alkali. With NaNO₂ and HCl, 'A' forms compound 'E' which reacts with phenol in alkaline medium to give an orange dye 'F' . Identify compounds 'A' to 'F'.

Predict the reagent or the product in the following reaction sequence.