What are the advantages of using CNG and LPG as fuels?

Describe how coal is formed from dead vegetation. What is this process called?

Fill in the blanks.

(a) Fossil fuels are …………… , …………… and …………… .

(b) Process of separation of different constituents from petroleum is called …………… .

(c) Least polluting fuel for vehicle is …………… .

Tick True/False against the following statements.

(a) Fossil fuels can be made in the laboratory.

(b) CNG is more polluting fuel than petrol.

(c) Coke is almost pure form of carbon.

(d) Coal tar is a mixture of various substances.

(e) Kerosene is not a fossil fuel.