Question

The number of chain isomers for $C_5{H}_{12}$ is :

• A. $4$
• B. $3$
• C. $6$
• D. $5$

Answer 1

The correct option is B $3$

• Chain isomers are molecules with the same molecular formula, but different arrangements of the carbon 'skeleton'.
• Pentane $C_5{H}_{12}$ is an organic compound with five carbon atoms. Pentane has three structural chain isomers that are n-pentane, Iso-pentane (methyl butane), and neopentane (dimethylpropane).

Option B is correct