Ethylidence dibromide is

Ethylene dibromide is heated with metallic zinc in the presence of alcohol. The gas so produced in the presence of alcohol. The gas so produced is allowed to react with hydrogen bromide. The product is :

Ethylidene dibromide overset(Delta)rarrCH-=CH, A is

When alocoholic solution of ethylene dibromide is heated with granulated zinc, the compound formed is

The compouhnd formed when alcoholic solution of ethylene dibromide is heated with granualted zinc is

When alcoholic solution of ethylene dibromide is heated with granulated zinc, the product formed is