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1

AIPMT 2012 Prelims

MCQ (Single Correct Answer)
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

2

AIPMT 2010 Prelims

MCQ (Single Correct Answer)
In a set of reactions, ethylbenzene yielded a product D.

D would be
A
B
C
D

Explanation

3

AIPMT 2010 Mains

MCQ (Single Correct Answer)
Which of the following conformers for ethylene glycol is most stable?
A
B
C
D

Explanation

The conformation (d) is most stable because of intermolecular H-bonding.
4

AIPMT 2010 Prelims

MCQ (Single Correct Answer)
The reaction of toluene with Cl2 in presence of FeCl3 gives X and reaction in presence of light gives Y. Thus, X and Y are
A
X = Benzal chloride, Y = o-chlorotoluene
B
X = m-chloroluene, Y = p-chlorotoluene
C
X = o- and p-chlorotoluene, Y = Trichloromethyl benzene
D
X = Benzyl chloride, Y = m-chlorotoluene

Explanation

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