Question

Which of the following is not a constituent of petroleum?
A. Paraffin wax
B. Lubricating oil
C. Petrol
D. Coke

Answer 1

Petroleum is the product of natural changes in organic materials. It is formed by hydrocarbons with the addition of other substances like sulfur. Petroleum is formed from organisms living in the sea. The constituents of petroleum are obtained by refining in petroleum refineries.

Complete step by step answer:
When the organisms die, their bodies settle at the bottom of the sea and get covered with sand and clay. Over millions of years, absence of air, high temperature and high pressure transforms the dead organisms into petroleum and natural gas.
Petroleum is a dark oil liquid which has an unpleasant odor. It is a mixture of various constituents like petroleum gas, petrol, diesel etc. The process of separating the constituents of petroleum is called refining. It is carried out in a petroleum refinery.
Therefore we can tell that only coke is not a constituent of petroleum. Coal is processed in an industry to get some useful products. Coke is one of the products. It is a tough, porous, black substance. It is a pure form of carbon. It is used in the manufacture of steel and in the extraction of many metals. It is derived from low ash, low-sulfur bituminous coal.

Hence option D is correct.

Note:
The table below gives information about the different constituents of petroleum and their uses.

Constituents of petroleum	Uses
Petrol	Fuel for light vehicles
Diesel	Fuel for heavy motor vehicles
Kerosene	Fuel for stoves, lamps and as aviation fuel
LPG	Fuel for home and industry
Lubricating oil	Used for lubrication in machines
Paraffin wax	Ointments, candles, Vaseline
Bitumen	Used to surface roads