SAT - Science - Biology - Air and Water Pollution

Question - 1

Which of the following is a greenhouse gas?

  • A Methane
  • B Oxygen
  • C Nitrogen
  • D Hydrogen

Question - 2

_______ is used to convert organic pollutants into water vapour and CO2

  • A Electrostatic precipitator
  • B Flame combustion
  • C Absorption
  • D Wet-scrubber

Question - 3

__________ are used in electrostatic precipitators.

  • A Catalysts
  • B Absorbers
  • C Electrodes
  • D Chemicals

Question - 4

Biological oxygen demand of _______ is the least

  • A Sewage
  • B Sea water
  • C Pure water
  • D Polluted water

Question - 5

Compounds of ______ cause "Minamata" disease

  • A Mercury
  • B Cadmium
  • C Cobalt
  • D Fertilisers

Question - 6

Due to eutrophication ________

  • A BOD increases
  • B BOD decreases
  • C Algae are destroyed
  • D Water becomes less harmful

Question - 7

_________ is the first step of sewage treatment.

  • A Precipitation
  • B Chlorination
  • C Sedimentation
  • D Aeration

Question - 8

World Environment Day is celebrated every year on ________

  • A 5th March
  • B 15th April
  • C 15th May
  • D 5th June

Question - 9

We and our surroundings together are called

  • A Environment
  • B Atmosphere
  • C Lithosphere
  • D Hydrosphere

Question - 10

Which of the following is not an environmental problem?

  • A Wastage of water
  • B Conservation of water
  • C Deforestation
  • D Land erosion
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