CBSE
Gujarat Board
Haryana Board
Class 10
Class 12
Fire produced by oil cannot be controlled by ___________ .
water
Fuel must be heated to its __________ before it starts burning.
ignition temperature
List conditions under which combustion can take place.
Conditions necessary for combustion are :
(i) Presence of combustible substance.
(ii) Attainment of ignition temperature.
(iii) Proper supply of air to provide oxygen.
Burning of wood and coal causes __________ of air.
pollution
A liquid fuel, used in homes is __________
kerosene