Presence of nitrogen in high concentration in contaminated air reduces – McqOptions

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1.	Presence of nitrogen in high concentration in contaminated air reduces partial pressure of oxygen in lungs, thereby causing asphyxia (suffocation) leading to death from oxygen deficiency. Concentration of N 2 in contaminated air at which it acts as a natural asphyxant is ? __________ percent.
A.	84
B.	88
C.	80
D.	92
Answer» B. 88

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