2. Questions Bank
  3. 8th Class
  4. Science
  5. Combustion and Flame

8th Class Science Combustion and Flame Question Bank Combustion and Flame Summative Subjective Problems

  • question_answer
    Fill in the blanks: (a) Burning of wood and coal causes ____ of air. (b) A liquid fuel used in homes is _______. (c)    Fuel    must    be    heated    to its    _____before it starts burning. (d) Fire produced by oil cannot be controlled by_____.

    Answer:

    (a) Burning of wood and coal causes __pollution__ of air. (b) A liquid fuel used in homes is __liquefied petroleum gas (LPG). (c) Fuel must be heated to its __ignition temperature__ before it starts burning. (d) Fire produced by oil cannot be controlled by __water__.


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