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1

AIPMT 2010 Prelims

MCQ (Single Correct Answer)
In the following the most stable conformation of n-butane is
A
B
C
D

Explanation

The anti-conformation is the most stable conformation of n-butane. In this, the bulky methyl groups are as far apart as possible thereby keeping steric repulsion at a minimum.
2

AIPMT 2009

MCQ (Single Correct Answer)
Which of the following compounds will exhibit cis-trans (geometrical) isomerism?
A
Butanol
B
2-Butyne
C
2-Butenol
D
2-Butene

Explanation

Alkenes with double bonds cannot undergo free rotation and can have different geometrical shapes with two different groups on each end of the double bond.
3

AIPMT 2009

MCQ (Single Correct Answer)
Benzene reacts with CH3Cl in the presence of anhydrons AlCl3 to form
A
chlorobenzene
B
benzyl chloride
C
xylene
D
toluene.

Explanation

4

AIPMT 2009

MCQ (Single Correct Answer)
The state of hybridisation of C2, C3, C5 and C6 of the hydrocarbon,


is in the following sequence
A
sp3, sp2, sp2 and sp
B
sp, sp2, sp2 and sp3
C
sp, sp2, sp3 and sp2
D
sp, sp3, sp2 and sp3

Explanation



$$ \therefore $$ C2 - sp, C3 - sp3, C5 - sp2 and C6 - sp3

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