A burning candle when placed in an enclosed jar immediately gets extinguished. This is because
The supply of CO2 is cut off
The supply of O2 is cut off
The supply of N2 is cut off
Both b &c
Which of the following gases cause acid rain?
III. Oxides of Nitrogen
IV. Sulphur dioxide
I and II only
II and IV only
III and IV only
All of these
In foam type extinguisher______ is present in bottle.
Mark the corret statement.
Different substances catch fire at the same temperature.
Different substances catch fire at different temperatures
Same substances can catch fire at different temperatures.
None of these
Increased percentage of carbon dioxide in air has been linked to __________
Bio gas is a secondary fuel obtained from .
Which zone is the hottest part in a candle flame?
_________ fuels gets exhausted over a period of time.
Which of the following are requirements for producing fire?
Oxygen and heat
Fuel and oxygen
Fuel, oxygen and heat
Fuel and heat
Which one of these is/are essentials of a fire?