what is meant by an alkene and describe the test for alkenes

Question 1

how are alkenes different from alkanes

Answer 1

alkenes have a double bond between two carbon atoms and they are unsaturated whereas aklanes have a single bond between two carbon atoms and are saturated

Question 2

why are alkenes useful

Answer 2

alkenes are used to make chemicals called polymers

alkenes are also used as the starting material for other useful chemicals as well

alkenes are more reactive than alkanes

Question 3

how to test for alkenes

Answer 3

we test for alkenes using bromine water, which is orange

if we shake the alkene with bromine water then the bromine water should turn colourless (do not say clear)