A. CO
B. SO2
C. NO2
D. CO2
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 density of the gases (present in air) decreases with increasing altitude to such an extent, that about 70% of the mass of atmospheric air is found in the lower 5 km. of the atmosphere. This lower region of atmosphere is called the_________________?
A. Ionosphere
B. Troposphere
C. Stratosphere
D. None of these - Most of the atmospheric air pollutants are present in large quantity in__________________?
A. Stratosphere
B. Thermosphere
C. Troposphere
D. Mesosphere - Foul odour and bad taste of water is removed by treating with__________________?
A. Alum
B. Bleaching powder
C. Activated carbon
D. Copper sulphate - There are thirteen metals which are treated as pollutants. Which of the following metals is not a pollutant ?
A. Mercury
B. Arsenic
C. Aluminium
D. Lead - Which of the following pollutants is absent in the emissions from a fertiliser plant ?
A. SO2 & SO3
B. NO2
C. NH3
D. CO - Which of the following air pollutants is not toxic to vegetation i.e., doesn’t cause vegetation damage ?
A. Smog & ozone
B. Hydrogen fluoride & nitrogen oxides
C. Sulphur dioxide & spray of weed killers
D. Carbon monoxide - ‘Particulate’ air pollutants are finely divided solids and liquids. Which of the following is not a „particulate‟ ?
A. Dust & mists
B. Smoke & fumes
C. Photochemical smog & soot
D. None of these - Which of the following is the most major constituents of air pollutants ?
A. Oxides of sulphur
B. Oxides of nitrogen
C. Carbon monoxide
D. Hydrogen sulphide - High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes____________________?
A. Cancer
B. Silicosis
C. Respiratory disease (e.g., asthma)
D. Reduced crop yield
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