The type of combustion in which a material suddenly bursts into flames, without the application of any apparent cause is called
Rapid combustion
Burning
Spontaneous combustion
Slow combustion
The amount of heat energy produced on complete combustion of 1kg of a fuel is called its
Calorific value
Efficiency
Heat capacity
Specific heat capacity
Which of the following gas produced can kill persons sleeping in a closed room where coal is burning?
Carbon monoxide
Carbon dioxide
Oxygen
Hydrogen
How heat and light are produced in Sun?
Nuclear reaction
Substitution reaction
Combustion
Thermal cracking
LPG stands for
Liquid petrolium gas
Light petrolium gas
Liquid phosphorous gas
None of these
In which reaction, a large amount of gas is formed?
Explosion
Oxidation
Which of the following poisonous gas is produced as a result of incomplete combustion?
The substances which have very low ignition temperature and can easily catch fire with a flame are called
Conducting substances
Flammable substances
Inflammable substances
Non conducting substances
The substances which vaporize during burning gives
Heat
Flame
Carbon
Which of the following is the rise in temperature of the atmosphere of the earth.
Acid rain
Green house effect
Global warming
Photosynthesis