Answer the following.
(a) Define combustion.
(b) What is a non-combustible substance
(c) What is rapid combustion?
(d) What are the conditions necessary for combustion?
(e) Why should water not be used to put off fire caused by oil?
Answers
Explanation:
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Answer:
a)rapid chemical combination of a substance with oxygen, involving the production of heat and light.
b)Non-combustible material – A non-combustible material is a substance that does not ignite, burn, support combustion, or release flammable vapors when subject to fire or heat, in the form in which it is used and under conditions anticipated.
c)Rapid combustion is a form of combustion in which large amounts of heat and light energy are released
d)Three things are required in proper combination before ignition and combustion can take place---Heat, Oxygen and Fuel. There must be Fuel to burn. There must be Air to supply oxygen. There must be Heat (ignition temperature) to start and continue the combustion process.
e) Water cannot put off fire produced due to burning petrol and oil because water is heavier than oil. It settles down or sinks below the oil particles and cannot bring the ignition temperature of the substance down or cannot cut off the supply of air to the fire. Hence, oil keeps on burning on the top.
Explanation:
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