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Question

Fill in the blanks :

  1. Burning of wood and coal causes ………. of air.

  2. A liquid fuel, used in homes is ……….

  3. Fuel must be heated to its ……….. before it starts burning.

  4. Fire produced by oil cannot be controlled by ……………


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Solution

  1. pollution

  2. kerosene

  3. ignition temperature

  4. water.


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