Question

The number of $\sigma$ and $\pi$ bonds in pent-$2$-yne is:

• A. $12$ and $2$
• B. $11$ and $2$
• C. $13$ and $2$
• D. $12$ and $3$

Answer 1

The correct option is A $12$ and $2$

The number of $\sigma$ and $\pi$ bonds in pent-2-yne is 12 and 2 respectively.
$H-\stackrel{H}{\stackrel{|}{\underset{\underset{H}{|}}{C}}}-C\equiv C-\stackrel{H}{\stackrel{|}{\underset{\underset{H}{|}}{C}}}-\stackrel{H}{\stackrel{|}{\underset{\underset{H}{|}}{C}}}-H$