Question

How will you convert first one, two dibromoethane to ethyne?

Answer 1

$\bold{ETHYNE}$

Ethyne is an alkyle ,an unsaturated carbon compound .

$\bold{PREPRATION \: OF \:ETHYNE}$

▶Ethyne can be prepared in laboratory by boiling 1 , 2 dibromoethane with hot concentrated alcoholic potassium hydroxide in a round bottom flask.

▶This process is carried out by Dehydrohalogenation.

It can be divided into two terms:-

✳Dehydro -Which means removal of water molecules.

✳DeHalogenation - Which means removal of halogen group from the compound.

So,

◼During reaction the halogen Bromine Br gets removed by dehalogenation which gets and forms a metalic halide.

◼The water molecules gets removed from the compound and the left carbon and hydrogen forms ethyne.

$C_2H_4Br_2 +2KOH \xrightarrow{boil} C_2H_2 + 2KBr + 2H_2O$