CBSE Class 12 Chemistry 2014 Delhi Set 1 Solved Paper

Question : 27 of 30

Marks: +1, -0

Give the structures of

A, B

and

C

in the following reactions:
(i)

{\CH}_3 {\Br} {{───▸}}↖{ {\KCN}} {\A} {{───▸}}↖{ {\LiAlH}_4} {\B} {{───▸}}↖{ {\HNO}_2} {\C}

(ii)

{\CH}_3 {\COOH} {{───▸}}↖{ {\NH}_3} {\A} {{───▸}}↖{ {\Br}_2+ {\KOH}} {\B}

{{───▸}}↖{ {\CHCl}_3+ {\NaOH}} {\C}

OR
How will you convert the following?
(i) Nitrobenzene into aniline.
(ii) Ethanoic acid into methanamine.
(iii) Aniline into N-phenylethanamide.
(Write the chemical equations involved.)

Solution:

(i)

{\CH}_3 {\Br} {{───▸}}↖{ {\KCN}} {{\CH}_3 {\CN}} {{───▸}}↖{ {\LiAlH}_4} {\CH_3\CH_2\NH_2}

{{───▸}}↖{ {\HNO}_2} {\CH_3\CH_2\OH}

(ii)

{\CH}_3 {\COOH} {{───▸}}↖{ {\NH}_3} {\CH_3\CONH_2} {{───▸}}↖{ {\Br}_2+ {\KOH}} {\CH_3\NH_2}

{{───▸}}↖{ {\CHCl}_3+ {\NaOH}} {\CH_3\N ≡ C}

OR
(i) Nitrobenzene into aniline

(ii) Ethanoic acid to methenamine

{\CH}_3 {\COOH} {───▸}↖{ {\NH}_3} {\CH}_3 {\CONH}_2{───▸}↖{\Br_2+\KOH} {\CH}_3 {\NH}_2

(iii) Aniline into N-phenylethaneamide

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