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Q.

Some statements regarding air pollution are given. Among them, the correct statements are 

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a

If the percentage of CO – Hb in the blood is 32% it causes immediate death

b

In urban areas, at the peak time of the traffic the level of CO is 100 to 500 pm

c

Above 80% of CO is released from automobiles

d

TLV of CO in the atmosphere is 9ppm

answer is A, B, D.

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Properties of CO.

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