1
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.
2
MCQ (Single Correct Answer)

AIPMT 2012 Prelims

In the following reaction


The major product is
A
B
C
D

Explanation

3
MCQ (Single Correct Answer)

AIPMT 2012 Prelims

Among the following compounds the one that is most reactive towards electrophilic nitration is
A
benzoic acid
B
nitrobenzene
C
toluene
D
benzene

Explanation

Due to electron releasing group like —R, —OH etc. increases the electron density at ortho and para position and thus makes the benzene ring more reactive towards electrophile. On the other hand, electron withdrawing groups like — COOH, —NO2 etc. reduces electron density and thus reduces the reactivity of benzene towards electrophile. Thus, the order is

4
MCQ (Single Correct Answer)

AIPMT 2010 Prelims

In a set of reactions, ethylbenzene yielded a product D.

D would be
A
B
C
D

Explanation

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