1
MCQ (Single Correct Answer)

NEET 2017

Which of the following reactions is appropriate for converting acetamide to methanamine?
A
Hoffmann hypobromamide reaction
B
Stephen's reaction
C
Gabriel phthalimide synthesis
D
Carbylamine reaction

Explanation


It is called Hoffmann's hypobromamide reaction.
2
MCQ (Single Correct Answer)

NEET 2017

The correct increasing order of basic strength for the following compounds is
A
III < I < II
B
III < II < I
C
II < I < III
D
II < III < I

Explanation

– NO2 group has strong – R effect and – CH3 shows +R effect.

$$ \therefore $$ Order of basic strength is

3
MCQ (Single Correct Answer)

NEET 2016 Phase 1

The product formed by the reaction of an aldehyde with a primary amine is
A
carboxylic acid
B
aromatic acid
C
Schiff's base
D
ketone

Explanation

4
MCQ (Single Correct Answer)

NEET 2016 Phase 1

The correct statement regarding the basicity of arylamines is
A
arylamines are generally more basic than alkalmines because of aryl group
B
arylamines are generally more basic than alkylmines, because the nitrogen atom in arylamines is sp-hybridised
C
arylamines are generally less basic than alkylamines because the nitrogen lone-pair electrons are delocalised by interaction with the aromatic ring $$\pi $$-electron system
D
arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are not delocalised by interaction with the aromatic ring $$\pi $$-electron system.

Explanation

In arylamines, lone pair of electrons on nitrogen atom is delocalized over the benzene ring, thus not available for donation so arylamine are less basic than alkylamines.

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