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For any compound to be aromatic, compoun...

For any compound to be aromatic, compound should follow a cartain rule known as Huckel's rule. According to Huckel's rule of aromaticity a). Compound should be cyclic
b). Compound should be planar and conjugated
c). Compound should have `(4n+2)pie^((-))`
where n=0,1,2,3, . . . . integer number.
Q. Identiy number of delocalised `pi`-electrons in pyridine

A

8

B

6

C

4

D

10

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The correct Answer is:
B
Lone pair of nitrogen does not participate in resonance.
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