Question

Give a chemical test to distinguish between ethane and ethene.

Answer 1

Sr. No	Test	Ethane	Ethene
1.	On adding a few drops of bromine solution in carbon tetrachloride to the hydrocarbon:	No change in colour is observed.	The reddish brown colour gets decolourised.
2.	On adding a few drops of alkaline potassium permanganate (purple colour) to the hydrocarbon:	No change in colour is observed.	The purple colour fades are observed.