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 ___.

Answer 1

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