What reagent is use to distinguish between propene and propane and what would be the observation??

Question

What reagent is use to distinguish between propene and propane and what would be the observation??

Answer 1

You are looking for a reagent that is specific for double bonds. If you look at any materials on qualitative organic analysis, you will find one mentioned (hint: a positive test means that the red colour disappears as the reagent adds across the double bond).

Answer 2

Excellent answer.   I would only note that propene and propane are gases and you will need to deal with the reagent Paul mentioned in a manner appropriate for gases.