Carbon monoxide is toxic because ___ .

it releases excess oxygen

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it wants more oxygen

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it is inert

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None of these

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Solution

The correct option is B
it wants more oxygen

Carbon monoxide is toxic because it requires more oxygen to get its valency satisfied. Once, inside our body, it competes with haemoglobins for oxygen. As haemoglobin is responsible for transporting oxygen inside our body, our body is unable to get proper oxygen supply.

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