How to differentiate an alkene from an alkane?

Question

differences + how to tell 1 from the other (practically) pls

:)

Answer 1

Add an aqueous solution of bromine ("bromine water") to the two substances under test.  There will be no change in colour with the alkane; with the alkene the brown-red colour of the bromine will rapidly disappear.

Alkenes contain C=C; while alkanes contain only double bonds.

Answer 2

Alkenes have a double bond in the carbon chain, alkanes are saturated and all bonds are single. Because of the double bond alkenes can undergo addition reactions easily.

The test to differentiate between an alkene and an alkane is to pass the gas or add the liquid to bromine water. This is naturally a yellow brown colour. In the case of alkenes the bromine will form an addition compound across the double bond, and the bromine water will become colourless. This cannot occur with alkanes which do not readily undergo addition reactions under these ambient conditions.

Answer 3

Alkanes have formula CnH(2n+2) and are single bonded. Alkenes have formula CnH(2n) are have one or more double C-C bonds. Alkanes are also known as unsaturated due to their single bonds while alkenes are saturated due to their double bonds.

Answer 4

Alkenes have a double bond between carbon atoms and an alkane has only single bonds between the carbon atoms.