Unsaturated hydrocarbons contain multiple bonds between the two C-atoms and show addition reaction. Give the test to distinguish ethane from ethene.

Explanation

Distinction between ethane and ethen can be done with the help of bromine water test. Whereas ethene discolourises the yellow colour of bromine water. Ethane does not .
`underset("Ethene (colourless)")(H-overset(H)overset(|)(C)=overset(H)overset(|)(C)-H)+underset(("Yellow"))(Br_(2))overset((Aq))tounderset("1,2-Dibromoethane (colourless)")(H-underset(Br)underset(|)overset(H)overset(|)(C)-underset(Br)underset(|)overset(H)overset(|)(C)-Br)`