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
$\mathrm{H}_2 \mathrm{O}>\mathrm{NH}_3>\mathrm{OH}^{-}>\mathrm{NH}_2^{-}$
26
MCQ (Single Correct Answer)
Which of the following should be most volatile?
I. $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{NH}_2$
II. $\left(\mathrm{CH}_3\right)_3 \mathrm{~N}$
III. 
IV. $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_3$
A
II
B
IV
C
I
D
III
27
MCQ (Multiple Correct Answer)
Which of the following methods of preparation of amines will give same number of carbon atoms in the chain of amines as in the reactant?
A
Reaction of nitrite with $\mathrm{LiAlH}_4$
B
Reaction of amide with $\mathrm{LiAlH}_4$ followed by treatment with water
C
Heating alkylhalide with potassium salt of phthalimide followed by hydrolysis
D
Treatment of amide with bromine in aqueous solution of sodium hydroxide.
28
MCQ (Multiple Correct Answer)
Which of the following cannot be prepared by Sandmeyer's reaction?
A
Chlorobenzene
B
Bromobenzene
C
Iodobenzene
D
Fluorobenzene
29
MCQ (Multiple Correct Answer)
Reduction of nitrobenzene by which of the following reagent gives aniline?
A
$\mathrm{Sn} / \mathrm{HCl}$
B
$\mathrm{Fe} / \mathrm{HCl}$
C
$\mathrm{H}_2-\mathrm{Pd}$
D
$\mathrm{Sn} / \mathrm{NH}_4 \mathrm{OH}$