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 ______ .
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Solution
(a) Burning of wood and coal causes pollution of air.
(b) A liquid fuel used in homes is Liquid 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.