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1

NEET 2013 (Karnataka)

MCQ (Single Correct Answer)
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

NEET 2013

MCQ (Single Correct Answer)
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

AIPMT 2012 Mains

MCQ (Single Correct Answer)
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

AIPMT 2012 Prelims

MCQ (Single Correct Answer)
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.

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