Which of the following is not obtained as a fractional during the refining of petroleum?

Which of the following is usually referred to as ‘black gold’?

the various compounds present in coal tar are separated by the process of:

Which one of the following is an inexhaustible natural resource?

The substances W is a fossil fuel. It occurs deep below the ground in certain areas of the earth. Another fossil fuel X is found trapped above the deposits of W. when W is subjected to a process called Y, then a number of different products are collected at different temperature ranges which are put to different uses. A special grade of product z obtained in this way is used an aviation fuel in jet aero planes.

(a) What are (i) W, and (ii) X

(b) what is the physical state of (i) W, and (ii) X?

(c) Name the process Y?

(d) Name the product Z?