Question
A hydrocarbon has the molecular formula C6H14. To which family does it belong? Write all the possible chain isomers. Give their IUPAC names.
Or
An alkane has molecular mass 86. Write the possible structural isomers of the alkane with their IUPAC names.
Solution
The molecular formula of alkane having molecular mass 86 can be found as follows:
Molecular mass of
Hence the molecular formula of an alkane is
It has five structural isomers.
Molecular mass of
Hence the molecular formula of an alkane is
It has five structural isomers. 
