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neet CHEMISTRYMedium

The number of σ\sigma bonds, π\pi bonds and lone pair of electrons in pyridine, respectively are:

1

11, 2, 0

2

12, 3, 0

3

11, 3, 1

4

12, 2, 1

Step-by-Step Solution

Pyridine (C5H5N\text{C}_5\text{H}_5\text{N}) has a hexagonal ring with 5 carbons and 1 nitrogen. There are 5 C-H bonds, 5 C-C/C-N single bonds, and 3 π\pi bonds (delocalized). Total σ\sigma bonds = 5 (C-H) + 5 (ring) + 1 (C-N) = 11. Total π\pi bonds = 3. Nitrogen has 1 lone pair. Thus, 11, 3, 1.

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