NEET Biology - New - Environmental Issues

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Question - 1

Biochemical oxygen demand may not be good index for water bodies receiving effluents:

  • A Sugar industry
  • B Domestic sewage
  • C Dairy industry
  • D Petroleum industry

Question - 2

A river with inflow of domestic sewage rich in organic waste may result:

  • A Drying of the river very soon due to algal bloom
  • B Increased population offish due tobiodegradable nutrients
  • C Increased population of aquatic food web organisms
  • D Death of fish due to lack of oxygen

Question - 3

Increase in concentration of the toxicant at successive trophic levels is known as:

  • A Biogeochemical cycling
  • B Biomagnification
  • C Biodeterioration
  • D Biotransformation

Question - 4

Which of the following is the most suitable indicator of S02 pollution in the environment?

  • A Lichens
  • B Conifer
  • C Algae
  • D Fungi

Question - 5

Scrubber in the exhaust of a chemical industrial plant removes:

  • A Gases like sulphur dioxide
  • B Particulate matter of the six 5 micrometre or above
  • C Gases like ozone and methane
  • D Particulate matter of the size 2.5 micrometre or less

Question - 6

The Air Prevention and Control of Pollution Act came into force in

  • A 1957
  • B 1981
  • C 1985
  • D 1990

Question - 7

In an area where DDT had been used extensively, the bird population declined significantly due to

  • A Birds stopped laying eggs
  • B Earthworms disappeared from the area
  • C Many of the birds egg did not hatch
  • D Snakes started feeding extensively on birds

Question - 8

The dB is a standard abbreviation used for the quantitative expression of:

  • A A particular pollutant
  • B The dominant Bacillus in a culture
  • C A certain pesticide
  • D The density of bacteria in a medium

Question - 9

BOD in river water:

  • A Remains unchanged when algal bloom occurs
  • B Increases when sewage gets mixed up with river water
  • C Has no relationship with concentration of oxygen in water
  • D Give a measure for Salmonella in water

Question - 10

Which particulate size is most harmful?

  • A 1.0 f.Lm or less
  • B 1.5 f.Lm or less
  • C 2.5 f.Lm or less
  • D 5.2 f.Lm - 2.5 f.Lm