1
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha-carbon, is
A
a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as carbonylation
B
a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as keto-enol tautomerism
C
a carbonyl compound with a hydrogen atom on its alpha-carbon never equilibrates with its corresponding enol
D
a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as aldehyde-ketone equilibration.
2
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
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.
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
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
4
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Change Language
In a diffraction pattern due to a single slit of width $$a$$, the first minimum is observed at an angle 30o when light of wavelength 5000 $$\mathop A\limits^ \circ $$ is incident on the slit. The first secondary maximum is observed at an angle of
A
sin$$-$$1$$\left( {{1 \over 2}} \right)$$
B
$${\sin ^{ - 1}}\left( {{3 \over 4}} \right)$$
C
$${\sin ^{ - 1}}\left( {{1 \over 4}} \right)$$
D
$${\sin ^{ - 1}}\left( {{2 \over 3}} \right)$$
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