Why are electrons shared equally in oxygen O2 but not in carbon monoxide CO?

Why are electrons shared equally in oxygen O2 but not in carbon monoxide CO?
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Teddy have marbles that are less than 60 marbles but more than 40 marbles.He shared them equally between 3 pots and their were no remainders when he shares it in 4 pots he has 3 remainders and when he shares them with 5 pots he have a remainder of 1?

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Ultraviolet radiation striking the earth is due to the depletion of – (1) carbon monoxide (2) carbon dioxide (3) ozone (4) oxygen

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Carbon monoxide has how much greater affinity for haemoglobin as compared to oxygen?

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Last Answer : 200 times

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The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen approximately by (a) 200 times (b) 1000 times (c) 2 times (d) 20 times.

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How carbon monoxide, emitted by automobiles, prevents transport of oxygen in the body tissues? (a) By forming a stable compound with haemoglobin (b) By obstructing the reaction of oxygen with haemoglobin (c) By changing oxygen into carbon dioxide (d) By destroying the haemoglobin

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