Environmental Issues (Multiple Choice Questions and Answers)

Environmental Issues

Multiple Choice Questions and Answers

1. Ultraviolet rays of the sunlight results in formation of

(a) Carbon monoxide

(b) Sulphur Dioxide

(c) Ozone

(d) Fluorides

Answer: (c) Ozone

2. Which of the following will not cause any atmospheric pollution?

(a) Hydrogen

(b) Sulphur Dioxide

(c) Carbon dioxide

(d) Carbon monoxide

Answer: (a) Hydrogen

 3. Sewage water can be purified for recycling with the action of

(a) aquatic plants

(b) penicillin

(c) microorganisms

(d) fishes

Answer: (c) microorganisms

 4. Today, concentration of greenhouse gases is high because of

(a) use of refrigerator

(b) increased combustion of oil and coal

(c) deforestation

(d) all of the above

Answer: (d) all of the above

 5. Photochemical smog is related to the pollution of

(a) soil

(b) water

(c) noise

(d) air

Answer: (d) air

 6. Most important causative pollutant of soil maybe

(a) plastics

(b) iron junks

(c) detergents

(d) glass junks

Answer: (a) plastics

 7. Taj Mahal is threatened due to the effect of

(a) chlorine

(b) sulphur dioxide

(c) oxygen

(d) hydrogen

Answer: (a) chlorine

 8. When huge amount of sewage is dumped into a river the BOD will

(a) increase

(b) remain unchanged

(c) slightly decrease

(d) decrease

Answer: (c) slightly decrease

 9. Which is a fungicide?

(a) 2,4-D

(b) DDT

(c) Bordeaux mixture

(d) BHC

Answer: (c) Bordeaux mixture

10. Rotenone is

(a) a bioherbicide

(b) an insect hormone

(c) a natural herbicide

(d) a natural insecticide

Answer: (b) an insect hormone

11. Which of the following is not produced as exhaust of vehicles?

(a) sulphur dioxide

(b) carbon dioxide

(c) carbon monoxide

(d) fly ash

Answer: (c) carbon monoxide

 12. Smog is

(a) smoke

(b) other name for dust storm

(c) moistened air gases

(d) smoke and fog

Answer: (c) moistened air gases

 13. The most dangerous metal pollutant of automobile exhaust is

(a) cadmium

(b) silver

(c) lead

(d) manganese

Answer: (c) lead

14. Which one of the following is a greenhouse gas?

(a) carbon dioxide

(b) carbon monoxide

(c) ozone

(d) oxygen

Answer: (a) carbon dioxide

 15. Smog produces

(a) O3

(b) NO2

(c) CH4

(d) Aluminium Ion

Answer: (d) Aluminium Ion

 16. Depletion of ozone layer is due to oxide of

(a) carbon

(b) phosphorus

(c) nitrogen

(d) none

Answer: (c) nitrogen

 17. Formation of ozone is maximum over

(a) Antarctica

(b) Africa

(c) Europe

(d) India

Answer: (c) Europe

 18. Oxidation Ponds involve

(a) chemical removal of pollutants

(b) mechanical screening of pollutants

(c) biological reduction of organic matter

(d) none of the above

Answer: (c) biological reduction of organic matter

 19. Natural sink of stratospheric ozone layer is

(a) SO2

(b) HCF

(c) Freons

(d) Sulphur flux of oceans

Answer: (b) HCF

 20. Water pollution is mainly caused by

(a) decay of bodies of aquatic animals

(b) industrial effluents

(c) excessive rain

(d) growth of phytoplankton

Answer: (d) growth of phytoplankton

 21. Which of the following is usually not classified as atmospheric pollutant?

(a) CO2

(b) CO

(c) NOx

(d) SO2

Answer: (c) NOx

 22. The sound above what level is considered as harmful?

(a) above 40 db

(b) above 60 db

(c) above 80 db

(d) above 120 db

Answer: (c) above 80 db

23. Which of the following is a secondary air pollutant?

(a) SO2

(b) NO2

(c) PAN

(d) Aerosol

Answer: (c) PAN

 24. Peeling of ozone umbrella, which protects us from UV rays, is caused by

(a) CFC’s

(b) coal burning

(c) CO2

(d) PAN

Answer: (a) CFC’s

 25. Greenhouse effect is caused by

(a) CO2 only

(b) CH4, SO2, NO2

(c) Those gases which absorb the infra red light reflecting from earth

(d) None of the above

Answer: (c) Those gases which absorb the infra red light reflecting from earth

 26. The result of ozone hole is

(a) acid rain

(b) global warming

(c) the UV radiations reach the earth

(d) greenhouse effect

Answer: (b) global warming

27. ‘Ozone hole’ means

(a) increase in the concentration of ozone

(b) decrease in the concentration of ozone

(c) same concentration of ozone

(d) hole in the stratosphere

Answer: (b) decrease in the concentration of ozone

 28. DDT is a

(a) Non-pollutant

(b) Non-biodegradable pollutant

(c) Biodegradable pollutant

(d) None

Answer: (b) Non-biodegradable pollutant

 29. Which of the following gases contribute to the global warming?

(a) carbon monoxide

(b) sulphur dioxide

(c) carbon dioxide

(d) nitrogen dioxide

Answer: (c) carbon dioxide

 30. Common indicator organism of water pollution is

(a) Entamoeba histolytica

(b) Lemna

(c) Eichhornia

(d) Escherichia coli

Answer: (d) Escherichia coli

31. Maximum air pollution is caused by

(a) smoke

(b) insecticide

(c) industry

(d) automobile exhaust

Answer: (d) automobile exhaust

 32. Bhopal gas tragedy of 1984 was caused by the leakage of

(a) methyl isocyanate

(b) 2-4 dichlorophenoxyacetic acid

(c) ammonia

(d) hydrogen cyanide

Answer: (a) methyl isocyanate

 33. Insecticides usually act upon

(a) muscular system

(b) digestive system

(c) nervous system

(d) circulatory system

Answer: (c) nervous system

 34. Black lung disease is common in

(a) farmers

(b) workers of petrochemical industry

(c) coal miners

(d) refinery workers

Answer: (c) coal miners

 35. An indicator species of polluted water is

(a) Tubifex

(b) phytoplankton

(c) zooplankton

(d) prawn

Answer: (a) Tubifex

 36. Eutrophication is often seen in

(a) deserts

(b) freshwater lakes

(c) oceans

(d) mountains

Answer: (b) freshwater lakes

 37. Secondary sewage treatment is mainly a

(a) physical process

(b) mechanical process

(c) chemical process

(d) biological process

Answer: (d) biological process

38. ‘Good Ozone’ is found in

(a) mesosphere

(b) troposphere

(c) stratosphere

(d) ionosphere

Answer: (c) stratosphere

39. Chipko movement was first led by

(a) Sunderlal Bahuguna

(b) Rajiv Gandhi

(c) Ramdev Mishra

(d) Indira Gandhi

Answer: (a) Sunderlal Bahuguna

 40. Green muffler is used against which type of pollution?

(a) air

(b) soil

(c) water

(d) noise

Answer: (d) noise

 41. UV radiations cause

(a) formation of thymine dimers

(b) deletion of base pairs

(c) methylation of bases

(d) addition of base pairs

Answer: (a) formation of thymine dimers

42. Which is a non biodegradable pollutant?

(a) Savage

(b) Sulphur Dioxide

(c) Oxides of Nitrogen

(d) Lead vapour

Answer: (d) Lead vapour

 43. Carbon dioxide is called as greenhouse gas because

(a) it is involved in photosynthesis

(b) it emits light

(c) it traps infrared radiation

(d) none

Answer: (c) it traps infrared radiation

 44. Some effects of SO2 and its transformation products on plants include

(a) chlorophyll destruction

(b) plasmolysis

(c) Golgi body destructions

(d) none

Answer: (a) chlorophyll destruction

 45. Lichens are important in the studies on atmospheric pollution because they

(a) can also grow in greatly polluted atmosphere

(b) can readily multiply in polluted atmosphere

(c) efficiently purify the atmosphere

(d) are sensitive to pollutants

Answer: (d) are sensitive to pollutants

 46. If water pollution continuous at its present rate, it will eventually

(a) stop water cycle

(b) prevent precipitation

(c) make oxygen molecules unavailable to water plants

(d) make nitrogen molecules unavailable to water plants

Answer: (c) make oxygen molecules unavailable to water plants

 47. All the following contribute to pollution except

(a) thermal power plant

(b) automobiles

(c) nuclear power plant

(d) hydroelectric power plant

Answer: (d) hydroelectric power plant

 48. The molecular action of ultraviolet light is mainly reflected through

(a) destruction of hydrogen bonds in DNA

(b) photo dynamic action

(c) formation of pyrimidine

(d) formation of sticky metaphase

Answer: (a) destruction of hydrogen bonds in DNA

49. Thermal pollution of water bodies is due to discharge of

(a) chemicals from industries

(b) heat from power plants

(c) agricultural run-off water

(d) wastes from mining

Answer: (b) heat from power plants

50. Biologists celebrate 5th June as

(a) Darwin’s birthday

(b) World Hygiene Day

(c) World Environment Day

(d) World Population Day

Answer: (c) World Environment Day

 51. Spraying of DDT on crops produces pollution of

(a) soil and water only

(b) air and soil only

(c) air, soil and water

(d) air and water only

Answer: (a) soil and water only