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1

AIPMT 2015

MCQ (Single Correct Answer)
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.

Explanation

Carbonyl compounds react with ammonia derivatives in weakly acidic medium as follows :
2

AIPMT 2015

MCQ (Single Correct Answer)
The oxidation of benzene by V2O5 in the presence of air produces
A
maleic anhydride
B
benzoic acid
C
benzaldehyde
D
benzoic anhydride.

Explanation

3

AIPMT 2014

MCQ (Single Correct Answer)
Which one is most reactive towards nucleophilic addition reaction?
A
B
C
D

Explanation

Electron withdrawing (–I, –M) groups are more reactive towards nucleophilic addition reactions. Thus, correct order is :
4

NEET 2013

MCQ (Single Correct Answer)
Reaction by which benzaldehyde cannot be prepared
A
B
C
D

Explanation

Joint Entrance Examination

JEE Main JEE Advanced WB JEE

Graduate Aptitude Test in Engineering

GATE CSE GATE ECE GATE EE GATE ME GATE CE GATE PI GATE IN

Medical

NEET

CBSE

Class 12