Question

Out of $5$ isomers of $C_4{H}_8$, how many of them are cyclic?

• A. $1$
• B. $2$
• C. $3$
• D. $0$

Answer 1

Answer: (B)

$2$

There are five constitutional isomers with the formula $C_4{H}_8$. They are:

1. But-1-ene
2. But-2-ene
3. 2-Methylpropane
4. Cyclobutane (cyclic)
5. methylcyclopropane (cyclic)