Which of the following is the most severe air pollutant ?

Related Mcqs:

Pick out the correct statement ?

A. Chemical oxygen demand (COD) is a measure of chemically oxidisable organic matter present in water B. COD is determined by oxidising the organic matter present in water with potassium dichromate in cone, sulphuric acid solution at boiling temperature for specified time C. COD is related to BOD of a given waste in water but … Pick out the correct statement ?Read More...

Pick out the wrong statement?

A. Biological oxygen demand (BOD) is a characteristic and not a constituent of water B. BOD is a measure of the amount of oxygen which will be demanded & used in 5 days by the biological decomposition of the organic matter present in water stream present as food for the living organism C. BOD is … Pick out the wrong statement?Read More...

Beyond what concentration of H2S in air, acute danger to human life exists ?

A. 50 ppm B. 100 ppm C. 300 ppm D. 700 ppm...

Green house effect is accentuated by________________?

A. Deforestation B. Rapid industrialisation C. Increased transportation activity D. All A., B. and C....

‘Safe limit’ called Threshold Limit Value (TLV) of carbon monoxide in atmospheric air is < 50 ppm. The main source of carbon monoxide pollutant in air is the____________________?

A. Industrial chimney exhaust B. Automobiles exhaust C. Photochemical reaction in polluted atmosphere D. Burning of domestic fuel...