Q.

How many of the following give foul smell when heated with CHCl3+KOH(alc)A) Isopropylamine              B) Tert-butylamine        C) Secondary butyalamine       D) Methylamine               E) Aniline

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a

2

b

1

c

5

d

3

answer is C.

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Detailed Solution

R – NH2 + CHCl3 + 3KOH(alc)  →△ R – NC + 3KCl + 3H2O 1oalkyl amine                                               foul smelling                                                                           isocyanide Ar – NH2 + CHCl3 + 3KOH(alc) →△  Ar – NC + 3KCl + 3H2O Primary                                                      foul smelling Arylamine                                                   isocyanide                                      This is a test to identify a 1o amine, (alkyl, aryl, aryl alkyl)(A) (CH3)2CHNH2  –   1o amine   (B) (CH3)3CNH2  –   1o amine   (C) CH3CH(NH2)CH2CH3 – 1o amine   (D) CH3NH2 – 1o amine   (E) C6H5NH2 – 1o amine
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