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Question

When combustion of coal takes place in insufficient air (oxygen), which gas is formed?


A

Sulphur dioxide

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B

Nitrous oxide

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C

Carbon monoxide

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D

Nitrogen peroxide

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Solution

The correct option is C

Carbon monoxide


Combustion is almost impossible to achieve since the chemical equilibriumis not necessarily reached, or may contain unburnt products such as carbon monoxide, hydrogenand even carbon (sootor ash).


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