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- 1. Multiple Choice
Combustion is a reaction in which a substance reacts with
hydrogen
Nitrogen
Oxygen
Chlorine
- 2. Multiple Choice
like fuel the sun also provides heat and light. the process taking place in the sun is called
Combustion
Nuclear Reaction
Burning
None of these
- 3. Multiple Choice
The substance which have very low ignition temperature will
Catch fire easily
Will not catch fire
Catch fire after some time
None of these
- 4. Multiple Choice
When a cracker is ignited, a sudden reaction takes place with the evolution of heat, light and sound. Identify the type of combustion?
Explosion
Random combustion
Rapid combustion
Spontaneous combustion
- 5. Multiple Choice
Which of the following is inflammable Substances?
Petrol
Wood
Paper
Straw
- 6. Multiple ChoiceWater is not used to control fires involving electrical appliances.FalseTrue
- 7. Multiple Choicewhat is the type of combustion
which occurs rapidly and produce heat and light?rapid combustionspontaneous combustionfast combustionexplosion - 8. Multiple Choice
When water is poured over burning wood, the fire goes off. This is because
temperature of wood decreases
temperature of water goes up
molecules of water reacts with oxygen present in the flame
the flame vapourises
- 9. Multiple Choice
Fire is extinguished by
removing all combustible substance
cutting off supply of air
cooling the burning substance
all the these
- 10. Multiple Choice
Combustion is a
Natural process
Chemical process
Physical process
None of these processes
- 11. Multiple Choice
Which one of the following is combustible?
Iron nail
Glass
Stone pieces
Paper
- 12. Multiple Choice
Fuel may be
Solid
Liquid
Gas
All of the three
- 13. Multiple Choice
CNG and LPG are the examples of
Solid fuels
Liquid fuels
Gaseous fuels
They are not fuels
- 14. Multiple Choice
The burning of LPG is an example of:
Explosion
Rapid Combustion
Spontaneous Combustion
Global Warming
- 15. Multiple Choice
The picture below shows two cases in which a person is trying to burn the paper cup. In case 1, the cup has water in it and in case 2, it is empty and dry. Identify in which of the cases the paper will burn easily.
Cup 2
Cup 1
Both will burn simultaneously
Both will not burn as paper is non combustible
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