Question

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 1

(a) Burning of wood and coal causes pollution of air. 

(b) A liquid fuel used in homes is LPG. 

(c) Fuel must be heated to its ignition temperature before it starts burning. 

(d) Fire produced by oil cannot be controlled by water