Photochemical smog pollution does not contain from Biology Envi

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51.

Photochemical smog pollution does not contain

  • ozone

  • nitrogen dioxide

  • carbon dioxide

  • carbon dioxide


C.

carbon dioxide

Photochemical smog is highly oxidising polluted atmosphere comprising largely of ozone (O3), oxides of nitrogen (NOx), hydrogen peroxide (H2O2), organic peroxides, peroxy acetyl nitrate (PAN) and peroxy benzyl nitrate (PBzN).
Some sulphates and nitrates can also be formed in photochemical smog due to oxidation of sulphur containing components (SO2,  H2S) and NOx (N2O5, NO2) but it does not contain carbon di-oxide (CO2). Photochemical smog materials and causes damage to plants, human health hazards and corrosion problems.

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52.

Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste water into natural surface water, is:

  • < 3.0 ppm

  • < 10 ppm

  • < 100 ppm

  • < 100 ppm

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53.

Which one of the following statements is not valid for aerosols?

  • They are harmful to human health

  • They alter rainfall and monsoon patterns

  • They cause increased agricultural productivity

  • They cause increased agricultural productivity

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54.

Which of the following in sewage treatment remove suspended solids?

  • Tertiary treatment

  • Secondary treatment

  • Primary treatment

  • Primary treatment

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55.

IUCN stands for 

  • Indian Union for Conservation of Nature

  • International Union for Conservation of Nature

  • Indian Union of Chemical Nomenclature

  • International Union for the conservation of Nutrients


56.

Which one of the following combination is incorrect?

  • Rio convention → Air pollution

  • Kyoto protocol  → Climate change

  • Montreal Protocol → Ozone depletion

  • Ramsar Convention → Wetland conservation


57.

Soil salinity is measured by

  • Porometer

  • Calorimeter

  • Conductivity meter

  • Potometer


58.

Which of the following species are restricted to an area?

  • Sympatric species

  • Sibling species

  • Allopatric species

  • Endemic species


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59.

Factor govering the earth surface is

  • Topographic

  • Edaphic

  • Temperature

  • Biotic


60.

Biological treatment of water pollution is done with the help of

  • Fungi

  • Lichen

  • Phytoplanktons

  • None of the above


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