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
23
MCQ (Single Correct Answer)
Which of the following compounds is the weakest Bronsted base?
A
B
C
D
24
MCQ (Single Correct Answer)
Among the following amines, the strongest Bronsted base is .............. .
A
B
NH$_3$
C
D
25
MCQ (Single Correct Answer)
The correct decreasing order of basic strength of the following species is ......... . $\mathrm{H}_2 \mathrm{O}, \mathrm{NH}_3, \mathrm{OH}^{-}, \mathrm{NH}_2^{-}$
A
$\mathrm{NH}_2^{-}>\mathrm{OH}^{-}>\mathrm{NH}_3>\mathrm{H}_2 \mathrm{O}$
B
$\mathrm{OH}^{-}>\mathrm{NH}_2^{-}>\mathrm{H}_2 \mathrm{O}>\mathrm{NH}_3$
C
$\mathrm{NH}_3>\mathrm{H}_2 \mathrm{O}>\mathrm{NH}_2^{-}>\mathrm{OH}^{-}$
D
$\mathrm{H}_2 \mathrm{O}>\mathrm{NH}_3>\mathrm{OH}^{-}>\mathrm{NH}_2^{-}$