Question

How can you tell the difference between alkane and alkene?

Answer 1

Difference between alkanes and alkenes:

S.No.	Alkanes	Alkenes
1	Alkanes are saturated hydrocarbons	Alkenes are unsaturated hydrocarbons
2	Alkanes have only single bonds	alkenes composed of both double and single bonds.
3	Alkanes cannot form polymers	alkenes can form polymers
4	Alkanes does not contain $\mathrm{\pi }$ bonds	alkenes contains $\mathrm{\pi }$ bonds
5	${\mathrm{CH}}_3-{\mathrm{CH}}_3$	${\mathrm{CH}}_2={\mathrm{CH}}_2$

The above tabular analysis clearly explains the difference between alkane and alkene.