Bitumen is a mixture of 500-700 organic compounds (hydrocarbons) in which also contains small proportions of Nitrogen, Sulphur and Oxygen.
It is a byproduct obtained during the distillation of the petroleum.
It is used in the construction of roads mainly as a binder, it binds the construction material together and provides the strength to roads.
The melting point of bitumen is high enough that it does not get melted in harsh weather conditions and much low that it can be melted at the construction site.
Using bitumen instead of Tar decreases the cost of construction.
Coke:
It is a fuel having high carbon content formed by heating the bituminous coal in the absence of air.
Uses:
Used in the Blast Furnace to reduce ferric oxide to Iron.
Used to prepare Syngas (carbon monoxide and hydrogen) and Producer gas (carbon monoxide + hydrogen + nitrogen).
Paraffin:
Paraffin is a hydrocarbon obtained from Petroleum during its dewaxing process.
Paraffin wax is used as fuel in candles and gives out fumes when burnt.
Paraffin oil is used as a pediatric laxative and also as a fuel (kerosene).
Naphthalene:
Naphthalene is an aromatic organic compound with Chemical formula C10H8.
The structure of Naphthalene is like two benzene rings fused together.