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1
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Which of the following reagents would distinguish cis-cyclopenta-1-2-diol from the trans-isomer?
A
MnO2
B
Aluminimum isopropoxide
C
Acetone
D
Ozone
2
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
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.
3
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
The oxidation of benzene by V2O5 in the presence of air produces
A
maleic anhydride
B
benzoic acid
C
benzaldehyde
D
benzoic anhydride.
4
AIPMT 2015
MCQ (Single Correct Answer)
+4
-1
Reaction of a carbonyl compound with one of the following reagents involves nucleophilic addition followed by elimination of water. The reagent is
A
hydrazine in presence of feebly acidic solution
B
hydrocyanic acid
C
sodium hydrogen sulphate
D
a Grignard reagent.
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