Which of the following molecules/species are aromatic in character?

     A                      B                          C                               D

1. B

2. C

3. D

4. A

${\mathrm{CH}}_3-\underset{|}{\mathrm{C}}\mathrm{H}-{\mathrm{CH}}_2-{\mathrm{CH}}_3 \underset{\mathrm{hv}}{\overset{{\mathrm{Cl}}_2}{\to }}$
${\mathrm{CH}}_3$

A number of chiral centers were generated during monochlorination in the above reaction:

1. 1             

2. 2             

3. 3             

4. 4

 $\stackrel{{\mathrm{Br}}_2/\mathrm{hv}}{\to }$ Monobromo derivatives

The number of possible monobromo products is (excluding stereoisomers):

1.  4     
2.  5 
3.  8
4.  10

$\underset{2. {\mathrm{NaHSO}}_3}{\overset{1. {\mathrm{OsO}}_4}{\to }}$ Product of the reaction is :

1.    

2. 

3.      

4. 

Addition of OsO₄ to cyclopentene generates:
(1) Achiral product

(2) Racemic product

(3) Meso product

(4) Optically active product

When 2-butyne is treated with H₂ Pd-BaSO₄, the product formed will be:

1. cis-2-Butene

2. trans-2-Butene

3. 1-Butene

4. 2-Hydroxy butane

 $\underset{Pt}{\overset{H_2}{\to }}$?

The product of the reaction is :

(1) Racemic
(2) Diastereomers
(3) Meso
(4) Pure enantiomers

A non-aromatic compound among the following compounds is:

1.		2.
3.		4.

Which of the following is aromatic?

1. 

2.  (Carbene)

3. 

4.  (Carbene)                    

Incorrect statement regarding aromaticity among the following is: