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 .
(a) Pollution
Burning of wood and coal causes pollution because when they burnt. Carbon dioxide is produced which is a polluted gas.
(b) LPG
We generally used LPG at home. LPG is a clean fuel. When LPG is burnt, no ash is produced behind.
(c) Ignition temperature
Ignition temperature is the minimum temperature at which any substance catches fire easily.
(d) Water
Fire cannot be controlled by water which is due to oil because water has high density than the oil. So, when water thrown on it, water sinks below the oil.
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