The number of σ bonds, π-bonds and the total bonds in benzene molecule. respectively, are:

Correct option is A

The correct answer is option ( a ) 12, 3, 15

Given :  Benzene molecule  $$(C_6H_6)$$​​

• Benzene is a hexagonal ring structure with 6 carbon atoms and 6 hydrogen atoms.
• Each carbon is bonded to:
  1. One hydrogen atom via a σ-bond.
  2. Two neighboring carbon atoms via one σ-bond each.
  3. Alternating double bonds form π-bonds.

Count the σ-bonds :

1. C - H σ-bonds :  6
2. C - C σ-bonds :  6

$$\text{Total }\sigma \text{-bonds}=6(\text{C-H})+6(\text{C-C})=12$$

Count the π-bonds :

• The alternating double bonds in benzene consist of 3 π-bonds, one for each double bond.

$$\text{Total }\pi \text{-bonds}=3$$

Count the total bonds :

$$\text{ Total bonds}=\text{σ-bonds}+\text{π-bonds}=12+3=15$$

σ-bonds: 121212

π-bonds: 333

Total bonds: 151515