COMBUSTION AND FLAME
LONG ANSWER QUESTIONS:
1. What are various problems caused by combustion of fuels?
Answer:
The various problems caused by combustion of fuels are:
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Combustion of coal is especially problematic; it produces gases like carbon monoxide
which is very dangerous.
Carbon dioxide produced by burning fuels causes global warming.
In gases, which are generally in solid fuels form produces smoke which causes air
pollution.
Solid fuel such as wood and coal, after burning also leaves ash. If this ash is not disposed
properly, it may lead to air and water pollution.
Oxides of sulphur and nitrogen dissolved in rain water and cause acid rain which is
harmful for buildings, crops and soil.
SHORT ANSWER QUESTIONS:
1. What are the disadvantages of incomplete combustion?
Answer: Disadvantages of incomplete combustion:
i.
During incomplete combustion, a part of the unburnt carbon goes into the atmosphere
in the form of soot. This wastes the fuel and pollutes the atmosphere.
ii.
During incomplete combustion, carbon monoxide is formed which is highly poisonous
and causes respiratory problems.
2. What are the ill effects of increasing consumption of fuels?
Answer: Ill effects of increasing consumption of fuels
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Excessive use of fuel leads to global warming.
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Fuels like wood, coal and petroleum release unburnt carbon particles which create
respiratory problems like asthma.
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Incomplete combustion release gases like carbon monoxide.
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Due to excess use of fuels, few oxides of sulphur and nitrogen released by burning of
fuels cause acid rain cause damage to buildings and soil.