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An electric spark is struck between two electrodes placed near each other in a closed tank full of petrol. Will the petrol catch fire ? Explain your answer.
No, the petrol will not catch fire. This is because in a closed tank full of petrol, there is no air to support the combustion of petrol. In the absence of supporter of combustion, petrol cannot burn or catch fire.
Burning of wood and coal causes __________ of air.
A liquid fuel, used in homes is __________
Fuel must be heated to its __________ before it starts burning.
Fire produced by oil cannot be controlled by ___________ .
Explain how the use of CNG in automobiles has reduced pollution in our cities.
Compare LPG and wood as fuels.
Give reasons :
Water is not used to control the fire involving electrical equipment.
Give reasons :
LPG is a better domestic fuel than wood.
Give reasons :
Paper by itself catches fire easily whereas a piece of paper wrapped around an aluminium pipe does not.
Make a labelled diagram of candle flame.
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