Some reliable indicators of air pollutants (SO2 and noxious gases) are:

Related Mcqs:

1. Gases commonly referred to as ‘green house gases’ are:

   A. CH4, N2, CO2 and NH3
   B. CO2, O2, NO2 and NH3
   C. Chloro-fluoro-carbons, CO2, NH3 and N2
   D. CO2, chloro-fluoro-carbons, CH4 and NO2

2. The pollutants like phenol, Na and Hg can be removed from water by technique/s such as:

   A. Reverse osmosis
   B. Electrodialysis
   C. Both (a) & (b)
   D. None of these

3. What are the chief pollutants of the atmosphere which are most likely to deplete the ozone layer?

   A. Sulphur di-oxide
   B. Carbon di-oxide
   C. Nitrogen oxides and fluoro-carbons
   D. Carbon monoxide

4. What is Pollutants:

   A. Agents that pollute; these may be gaseous (vapours) or particulate (solid and liquid particles)
   B. On the basis of the amount and their relative harmfulness or toxicity
   C. Both (a) & (b)
   D. None of these

5. Pollution of SO2 destroy:

   A. Fungi
   B. Lichen
   C. Algae
   D. Fishes

6. Presence of SO2 in atmosphere is indicated by:

   A. Mosses
   B. Liver worts
   C. Lichens
   D. Ferns

7. The concentration of SO2 in the atmosphere is around:

   A. 0.01 ppm
   B. 0.001 ppm
   C. 0.5 ppm
   D. 0.75 ppm

8. The component of a living cell affected by the pollutant SO2 is:

   A. Nucleus
   B. All cell membrane system
   C. Cell wall
   D. Plasmodesmata

9. The SO2 is returned to the atmosphere by:

   A. Metabolism of producers
   B. Metabolism of consumers
   C. Both (a) & (b)
   D. Combustion of fuel

10. The air pollution caused by phosphate fertilizer factories is due to:The air pollution caused by phosphate fertilizer factories is due to:

    A. Phosphene
    B. SiF4
    C. Dust
    D. Halogens