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Question
What happens when ethene (C2H4) burns in the presence of excess of air?
What happens when ethene (C2H4) burns in the presence of excess of air?
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Solution
The correct option is B Carbon dioxide is produced
Ethene burns in air with a sooty flame producing a large amount of energy. Generation of sooty flame is because of incomplete combustion of ethene.
However, if the supply of air is in excess, it burns with a pale blue flame to produce carbon dioxide, water and a large amount of heat. C2H4(g)+3O2(g) → 2CO2(g)+2H2O(g)+Heat
Ethene burns in air with a sooty flame producing a large amount of energy. Generation of sooty flame is because of incomplete combustion of ethene.
However, if the supply of air is in excess, it burns with a pale blue flame to produce carbon dioxide, water and a large amount of heat.
C2H4(g)+3O2(g) → 2CO2(g)+2H2O(g)+Heat