12 Questions
What is the term for the lowest temperature at which a substance ignites?
Ignition temperature
Which type of combustion releases a huge amount of heat and light at a high speed?
Rapid combustion
What is the main difference between inflammable and combustible substances?
Inflammable substances easily catch fire with a flame.
What is the visible gaseous part of a light called?
Flame
Which of the following is a property of fuels?
They burn to produce heat energy.
What is the process in which large amounts of gas are evolved along with tremendous heat, light, and sound?
Explosion
What is the calorific value of a fuel?
The heat energy released on complete combustion of 1kg of the fuel
Why is it difficult to burn a heap of green leaves compared to dry leaves?
Green leaves contain moisture, increasing their ignition temperature
Why does a goldsmith use the outermost zone of a candle flame for melting gold and silver?
It is the hottest part of the flame
Is rusting considered combustion? Why or why not?
No, because no heat is produced during rusting
In which part of the flame should a beaker be placed to heat water fastest?
Outermost zone
What is the unit for calorific value of a fuel?
Kilojoule per kilogram
Learn about the combustion process, including key terms such as combustion, combustible substances, ignition temperature, inflammable substances, and rapid combustion.
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