Question

Number of $\pi$ bonds and $\sigma$ bonds in the following structure is –

• A. $4,20$
• B. $5,19$
• C. $6,19$
• D. $5,20$

Answer 1

The correct option is B $5,19$

•Single bonds have only one sigma $\left(\sigma \right)$ bond.

•Double bonds have one sigma $\left(\sigma \right)$ bond and one $\pi -$bond.

•Triple bonds have one sigma $\left(\sigma \right)$ bond and two $\pi -$bonds.

In the given molecule there are-

• $8C-H$ Sigma $\left(\sigma \right)$ Bonds.

• $11C-C$ Sigma $\left(\sigma \right)$ Bonds.

• So, there are total $19$ Sigma $\left(\sigma \right)$ Bonds.

• And there are $5\pi -$bonds.

So, there are total $19$ sigma $\left(\sigma \right)$ bonds and $5\pi -$bonds in the given molecule.

Hence, the correct choice is $\left(C\right).$