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Environmental Issues

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Biology

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Biology

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CBSE Gujarat Board Haryana Board

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Class 10 Class 12

Montreal Protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year

  • 1986

  • 1987

  • 1988

  • 1985


B.

1987

In 1987, twenty seven industrialized countries signed the Montreal Protocol for reduction in production and release of ozone layer depleting CFCs(Chloro fluoro carbons) into the atmosphere. It was followed by increasingly stringent amendments in London in 1990 and in Copenhagen in 1992.

In 1987, twenty seven industrialized countries signed the Montreal Protocol for reduction in production and release of ozone layer depleting CFCs(Chloro fluoro carbons) into the atmosphere. It was followed by increasingly stringent amendments in London in 1990 and in Copenhagen in 1992.


In the scrubber in the electrostatic precipitator the gases are passed through :
  • filter
  • lime
  • spray of water
  • both 2 and 3

D.

both 2 and 3

Ozone depletion will cause :
  • Forest fire
  • Pneumonia
  • Increased incidence of skin cancer
  • None of these

C.

Increased incidence of skin cancer

The meaning of BOD is :
  • Bacterial oxygen demand
  • Biological optimum density
  • Biochemical oxygen demand
  • Bioorganisation decay

C.

Biochemical oxygen demand

What is the term for the inflammation of cornea due to high absorption of UV-B radiation :
  • myopia
  • snow blindness
  • biomagnification
  • None of the above

B.

snow blindness

Which of the following pollutants is not produced by exhaust of motor vehicles ?
  • CO
  • Hydrocarbon
  • Fly-ash
  • NO

C.

Fly-ash