Question

Find the total structural isomers of $C_5{H}_{10}$

• A. 5
• B. 10
• C. 15
• D. 20

Answer 1

The correct option is B 10

For a compound with molecular formula $C_c{H}_h{X}_x{N}_n{O}_o$

$\text{Degree of unsaturation}=(c+1)-\frac{h}{2}-\frac{x}{2}+\frac{n}{2}$

Molecular formula of the given compound is $C_5{H}_{10}$
$\text{Degree of unsaturation}=(5+1)-\frac{10}{2}=1$

Thus, it can be a double bond or a ring structure.
The possible structural isomers are