Question

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 a vehicle is ______________ .​

Answer 1

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(a) Fossil fuels Coal, Petroleum, and natural gas.

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

(c) Least polluting fuel for a vehicle is Compressed Natural Gas (CNG).

Answer 2

Answer:

1. Fossil fuels are coal , petroleum , and natural gas .
2. Process of separation of different constituents from petroleum is called Refining .
3. Least polluting fuel for a vehicle is CNG .

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