Question

Distinguish between the saturated hydrocarbon ethane and the unsaturated hydrocarbon ethene by drawing their structural formulae.

Answer 1

Sr. No.	Saturated hydrocarbon (Ethane)	Unsaturated hydrocarbon (Ethene)
1.	\[\begin{array}{cc} \phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\\ \phantom{....}|\phantom{...} \phantom{.}|\phantom{....}\\ \ce{H - C - C - H}\\ \phantom{....}|\phantom{...} \phantom{.}|\phantom{....}\\ \phantom{...}\ce{H}\phantom{...}\ce{H}\phantom{...}\\ \end{array}\]	\[\begin{array}{cc} \phantom{........}\ce{H}\phantom{...}\ce{H}\phantom{........}\\ \phantom{....}|\phantom{...} \phantom{.}|\phantom{....}\\ \ce{C = C}\\ \phantom{....}|\phantom{...} \phantom{.}|\phantom{....}\\ \phantom{........}\ce{H}\phantom{...}\ce{H}\phantom{........}\\ \end{array}\]
2.	It has a carbon-carbon single bond.	It has carbon-carbon double bond.
3.	Alkanes undergo a substitution reaction.	Alkenes undergo addition reaction.