8th Class Science Combustion and Flame Question Bank Combustion and Flame Formative Objective Problems

  • question_answer
    What is a major cause of global warming?

    A)  Gaseous nitrogen oxides released by petrol    engines

    B)  Oxides of sulphur and nitrogen dissolved in rain water

    C)  Emission of sulphur dioxide on combustion of coal

    D)  Release of carbon dioxide on combustion of fuels

    Correct Answer: D

    Solution :

      On combustion, almost every fuel releases carbon dioxide in the environment. The increased concentration of carbon dioxide is believed to capture the reflected rays, thereby increasing the temperature of the Earth. Hence, it leads to global warming. The correct answer is D.


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