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Question

What is meant by incomplete combustion?

A
Combustion in insufficient supply of air
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B
Combustion in insufficient supply of carbon dioxide
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C
Combustion in sufficient supply of oxygen
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D
Combustion in sufficient supply of water vapour
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Solution

The correct option is A Combustion in insufficient supply of air
Incomplete combustion takes place when there is not enough oxygen to allow the fuel to react completely and burn in order to produce carbon dioxide and water. For example, the yellow flame of a burning candle is due to the presence of unburnt carbon particles that are hot and emit a yellow light.

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