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  3. 8th Class
  4. Science
  5. Coal and Petroleum

8th Class Science Coal and Petroleum

  • question_answer 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 vehicles is..............  

    Answer:

    (a) coal, petroleum, natural gas (b) refining (c) CNG  


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