Question

Neopentane and isopentane are:

• A. allotropes
• B. isobars
• C. isomers
• D. homologous

Answer 1

The correct option is C isomers

Isomers are molecules that have the same molecular formula but have a different arrangement of the atoms.

Pentane has 3 isomers, pentane (n-pentane); 5-carbon straight-chain, 2-methyl butane; 4-carbon straight chain with a methyl group on second carbon (isopentane), 2,2-dimethylpropane; 3-carbon straight chain with 2 methyl groups on second carbon (neopentane).

Hence they are isomers of each other.