Question

Propyne molecule contains:

• A. 6 sigma and 2 pi bonds
• B. 5 sigma bonds
• C. 5 pi bonds and 1 sigma bond
• D. 2 sigma and 3 pi bonds.

Answer 1

Answer: (A)

6 sigma and 2 pi bonds

It is to be noted that $\pi$ bond only form when $\sigma$ bond already exist, tripple bond means $1$ $\sigma$ and $2$ $\pi$ bond, so propyne has $6$ $\sigma$ and $2$ $\pi$ bonds.

So the correct option is $\left[A\right]$.