1
MCQ (Single Correct Answer)

NEET 2013 (Karnataka)

Which of the following chemical system is non aromatic ?
A
B
C
D

Explanation

The molecules which do not satisfy Huckel rule or (4n + 2)$$\pi $$-electron rule are said to be non-aromatic.

The compound (d) has four $$\pi $$ electrons. It does not follow (4n + 2)$$\pi $$ rule. So it is non-aromatic compound.
2
MCQ (Single Correct Answer)

NEET 2013

Which of the following compounds will not undergo Friedal-Craft's reaction easily?
A
Nitrobenzene
B
Toluene
C
Cumene
D
Xylene

Explanation

Nitrobenzene is strongly deactivated, hence will not undergo Friedel-Crafts reaction.
3
MCQ (Single Correct Answer)

AIPMT 2012 Mains

Which of the following reagents will be able to distinguish between 1-butyne and 2-butyne?
A
NaNH2
B
HCl
C
O2
D
Br2

Explanation

4
MCQ (Single Correct Answer)

AIPMT 2012 Prelims

Which of the following acids does not exhibit optical isomerism?
A
Maleic acid
B
$$\alpha $$-amino acids
C
Lactic acid
D
Tartaric acid

Explanation

HOOC – CH = CH – COOH (Maleic acid) almost show optical isomerism.

EXAM MAP

Joint Entrance Examination

JEE Advanced JEE Main

Graduate Aptitude Test in Engineering

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

Medical

NEET

CBSE

Class 12