Question

The maximum number of structural isomers possible for the hydrocarbon having the molecular formula $C_4{H}_6$ is:

• A. $12$
• B. $3$
• C. $9$
• D. $5$

Answer 1

The correct option is C $9$

The degree of unsaturation of the compound is $2$ means it can have $2$ double bonds, $1$ triple bond, $1$ ring and $1$ one double bond or two rings.