Question

give a chemical test to distuinguish butane and butene

Answer 1

Explanation:

The butane will not react (left-hand test tube). The but-2-ene will decolourize the bromine solution (right-hand test tube). Bubble each gas through a cold, dilute, aqueous solution of KMnO4 . ... With but-2-ene, the purple colour will disappear and a dark brown precipitate will form (bottom test tube)

Answer 2

Answer:

Explanation:

Test 1. Bromine decolourization test

Add a few drops of a solution of #"Br"_2#in #"CCl"_4# to a solution of each hydrocarbon in #"CCl"_4#.

The butane will not react (left-hand test tube). The but-2-ene will decolourize the bromine solution (right-hand test tube).