Question

In $1-butene$ number of $\sigma$- bonds is:

• A. $8$
• B. $10$
• C. $11$
• D. $12$

Answer 1

Answer: (C)

$11$

The first bond between any two atoms is $\sigma$ and rest are $\pi$ bonds. Draw structure of $butene-1$ and count $\sigma$ bonds in it.
$\therefore$ It has $11\sigma$ and $1\pi$ bond.