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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