Question

In addition to some propane and ethane, LPG cylinders contain mainly two isomers of another alkane. Name the two isomers and write their condensed structural formulae.

Answer 1

n-butane and iso-butane are the two isomers of butane found in LPG cylinders.

The condensed structural formulas of n-butane and iso-butane are as follows:
n-butane : CH₃CH₂CH₂CH₃
iso-butane : CH₃CHCH₃
                         ╵
                       CH₃