1.

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 vehicles is

Answer» 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 vehicles is


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