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  3. 8th Class
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  5. Coal and Petroleum

8th Class Science Coal and Petroleum Question Bank Coal and Petroleum Summative Subjective Problems

  • question_answer
    What is coal gas? Write the uses of coal gas.

    Answer:

    Coal gas is a byproduct formed when coal is heated in absence of air. Uses: (i) It is used as fuel in many industries. (ii) Previously it is used for street lighting in London in 1810.


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