Question

Match List I with List II

List I		List II
A	Benzenesulphonyl chloride	I	Test for primaryamines
B	Hoffmannbromamide reaction	II	Anti Saytzeff
C	Carbylaminereaction	III	Hinsbergreagent
D	Hoffmannorientation	IV	Known reactionof Isocyanates.

Choose the correct answer from the options given below:

• A. A-IV, B -III, C-II, D-I
• B. A-IV, B -II, C-I, D-III
• C. A-III, B -IV, C-I, D-II
• D. A-IV, B -III, C-I, D-II

Answer 1

Answer: (C)

Benzen sulphonyl chloride
(B) Hoffmann bromamide reaction $\rightarrow$ known reaction of isocynates
$R - CO - NH _2+ X _2+4 NaOH \rightarrow$
$ R - NH _2+2 NaX _2+ Na _2 CO _3+2 H _2 O$
Intermediate $: R - N = C = O$ (isocyanat
(C) Carbylamine reaction $\rightarrow$ Test for primary amine
$R - NH _2$ or $Ar - NH _2+ CHCl _3+3 KOH$
$\rightarrow RNC$ or $Ar - NC +3 KCl +3 H _2 O$
(D) Hoffmann orientation $\rightarrow$ Anti saytzeff (Formation of less substituted alkene as major product)