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Q.1
Identify the incorrect statement regarding aromaticity.
does not follow Huckel’s rule
Cyclic delocalization takes place
p-orbitals must be planar and overlap
It is the extra stability possessed by a molecule
Q.2
The maximum number of stereoisomers possible for 4-phenyl but-3-en-2ol is
1
2
3
4
Q.3
Benzene is more stable than alkenes due to
Electron losing tendency of ring
Resonance of the ring
Electron gaining tendency of ring
Electromeric effect
Q.4
Choose the correct statement(s) for aromatic compounds
They are cyclic and planer
They have \pi π delocalized electrons
They have conjugated double bonds
All of above
Q.5
An asymmetric carbon is the same as a...
achiral carbon
chiral carbon
prochiral carbon
axial carbon
Q.6
Which of the following alkanes would you expect to have the lowest melting point?
octane
propane
pentane
butane
Q.7
Which of the substituents are ranked as the lowest priority based on Cahn-Ingold-Prelog ranking rules?
-C(O)H
-CH2OH
-CH2-O-C(O)CH3
Q.8
Which of the substituents are ranked as the lowest based Cahn-Ingold-Prelog ranking rules?
-NH2
-C≡N
-NO2
Q.9
Which of the substituents are ranked as the highest priority based on Cahn-Ingold-Prelog ranking rules?
-OH
-CH2CH3
-H2PO4
Q.10
A racemic mixture is optically active.
yes
no
Q.11
Optical isomers are of how many types
2
3
4
5
Q.12
Which number of pi electrons satisfies Huckel's rule. Check all that apply
3
4
6
8
Q.13
Can a linear molecule have aromaticity.
Yes
No
None of the above
Q.14
Number of Pi bonds in benzene are
4
3
2
1
Q.15
Aromaticity is given by
Kekule's rule
Huckel's rule
4n+2 π electrons rule
Both b and c
Q.16
ANTHRACENE HAS ___________ ANNULAR CARBON ATOMS.
ONE
TWO
FOUR
SIX
Q.17
NAPHTHALENE CONSIST OF __________ ANULAR POSITIONS.
ONE
TWO
THREE
NONE OF THE ABOVE
Q.18
THE ENERGY DIFFERENCE BETWEEN BOAT AND CHAIE CONFORMATION OF CYCLOHEXANE IS____________ KCAL/MOLE
11.2
7.1
1.7
5.2
Q.19
CYCLOPROPANE HAS MAXIMUM ___________ STRAIN
ANGLE
VAN DER WAALS
PITZER
TRANSANNULAR
Q.20
WHICH ONE IS THE MOST STABLE FORM OF CYCLOHEXANE?
CHAIR
BOAT
TWIST BOAT
HALF CHAIR
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