4
Question Question 4
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 ............... .
(a) Fossil fuels are coal, petroleum and natural gas.
(b) Process of separation of different constituents from petroleum is called refining.
(c) Least polluting fuel for vehicle is CNG.