1
MCQ (Single Correct Answer)

AIPMT 2015

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
MCQ (Single Correct Answer)

AIPMT 2015

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
MCQ (Single Correct Answer)

AIPMT 2014

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
MCQ (Single Correct Answer)

NEET 2013

Reaction by which benzaldehyde cannot be prepared
A
B
C
D

Explanation

EXAM MAP

Joint Entrance Examination

JEE Advanced JEE Main

Medical

NEET

Graduate Aptitude Test in Engineering

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