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Question

The poisonous gas formed by the combustion of coal in insufficient oxygen is:

A
sulphar dioxide
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B
carbon dioxide
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C
carbon monoxide
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D
nitric oxide
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Solution

The correct option is D carbon monoxide

Carbon monoxide is produced from the partial oxidation of carbon-containing compounds; it forms when there is not enough oxygen to produce carbon dioxide, such as when operating a stove or an internal combustion engine in an enclosed space. In the presence of oxygen, including atmospheric concentrations, carbon monoxide burns with a blue flame, producing carbon dioxide.


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