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 N2 in contaminated air at which it acts as a natural asphyxiate is ≥ _____________ percent?

Related Mcqs:

Very small amount of air pollutants are present in stratosphere also; though most of the atmospheric pollutants are present in the troposphere. Which of the following atmospheric pollutants does not cause the ozone layer depletion in atmosphere at tremendous rate ?

A. CO B. SO2 C. NOx D. CFC (chloro fluoro carbons)...

The Killer gas which caused Bhopal gas tragedy in 1984 was________________?

A. Phosgene B. Methyl isocyanate (MIC) C. Carbon monoxide D. Sulphur dioxide...

Maximum permissible turbidity in potable water is _____________ ppm?

A. 1 B. 10 C. 250 D. 1000...

Lead exhausted in the atmosphere by automobiles using leaded petrol (i.e. tetraethyl lead for improving octane number) is a lethal air pollutant which causes_________________?

A. Paralysis of muscles & loss of appetite B. Nervous depression C. Gastritis and diarrhea D. All A., B. and C....

Limestone powder is injected during pulverised coal burning in boilers to ______________ the flue gases?

A. Reduce SO2 content in B. Catalytically convert SO2 to SO3 in C. Increase the dew point of D. None of these...