18
MCQ (Single Correct Answer)
The most reactive amine towards dilute hydrochloric acid is ............. .
A
$\mathrm{CH}_3-\mathrm{NH}_2$
B
C
D
19
MCQ (Single Correct Answer)
Acid anhydrides on reaction with primary amines give ............ .
A
amide
B
imide
C
secondary amine
D
imine
20
MCQ (Single Correct Answer)
The reaction $$\mathrm{Ar\mathop {{N_2}}\limits^ + C{l^ - }}$$ $\xrightarrow{\mathrm{Cu} / \mathrm{HCl}} \mathrm{ArCl}+\mathrm{N}_2+\mathrm{CuCl}$ is named as ................ .
A
Sandmeyer reaction
B
Gattermann reaction
C
Claisen reaction
D
Carbylamine reaction
21
MCQ (Single Correct Answer)
Best method for preparing primary amines from alkyl halides without changing the number of carbon atoms in the chain is ............... .
A
Hofmann bromamide reaction
B
Gabriel phthalimide synthesis
C
Sandmeyer reaction
D
reaction with $\mathrm{NH}_3$
22
MCQ (Single Correct Answer)
Which of the following compound will not undergo azo coupling reaction with benzene diazonium chloride?
A
Aniline
B
Phenol
C
Anisole
D
Nitrobenzene