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Environmental Issues

Board » Bihar Board » Class 12th » English Medium » Science » Biology » L-16 : Environmental Issues

Objective Questions (MCQs)

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ID- 11322
BSEB, 2012, 2021 (A)

1. Which of the following is not a green house gas?

  • (A) Methane
  • (B) Chlorofluorocarbon
  • (C) CO2
  • (D) Nitrogen
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ID- 11323
BSEB, 2012, 2021 (A)

2. Biogas contains:

  • (A) CO2
  • (B) H2S
  • (C) CH4
  • (D) All of these
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ID- 11324
BSEB, 2013

3. Chipko Movement is associated with:

  • (A) cultivation of trees
  • (B) protecting trees from feeling down by human beings
  • (C) giving up tobacco abuse
  • (D) all of these
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ID- 11325

4. The two gases making highest relative contribution to green house gases are:

  • (A) CH4 and N2O
  • (B) CFCs and N2O
  • (C) CO2 and N2O
  • (D) CO2 and CH4
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ID- 11326

5. Eutrophication is often seen in:

  • (A) Ocean
  • (B) Mountains
  • (C) Deserts
  • (D) Fresh water lakes
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ID- 11327

6. 'Good ozone' is found in:

  • (A) Stratosphere
  • (B) Ionosphere
  • (C) Mesosphere
  • (D) Trophosphere
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ID- 11328

7. DDT residues are rapidly passed through food chain because DDT is:

  • (A) Water soluble
  • (B) Nontoxic
  • (C) Liposoluble
  • (D) Moderately toxic
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8. Global agreement to reduce release of ODS is:

  • (A) Montreal Protocol
  • (B) Kyoton Protocol
  • (C) Viene Convention
  • (D) Rio de Janeiro Conference
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ID- 11330

9. Blue baby syndrome is caused by:

  • (A) Excess of TDS
  • (B) Excess of chlorides
  • (C) Excess of dissolved oxygen
  • (D) Methaemoglobin
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Blue Baby Syndrome is caused by methemoglobinemia, which results from nitrate contamination in drinking water. The correct answer should be (d) Methaemoglobin

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10. Chipko Movement began in:

  • (A) 1953
  • (B) 1963
  • (C) 1969
  • (D) 1973
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ID- 11332

11. Which one of the following is not pollutant?

  • (A) CO2
  • (B) CO
  • (C) SO2
  • (D) NO2
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EXPLANATION:

The pollutant can be defined as a substance which pollutes the environment or adversely affect the resources. Carbon dioxide is a significant component of the atmosphere though present in small amount. It helps in several biological processes such as respiration, greenhouse effect( trapping the solar radiation to keep earth's surface warm). Carbon dioxide has many useful functions only when it is present in the naturally desired quantity in the atmosphere. The excess in the atmosphere than the usual quantity can cause serious problems to the environment and atmosphere. Hence, the correct answer is 'CO2​'.

Therefore, option A is correct.

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ID- 11334
BSEB, 2012

12. 5th June is:

  • (A) World forest Day
  • (B) World Red Cross Day
  • (C) World Environment Day
  • (D) World Food Day
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ID- 11335

13. Which chemical substance affects the Ozone Layer?

  • (A) Chlorofluorocarbon
  • (B) Chlorine
  • (C) Hexafluorocarbon
  • (D) Molecular Carbon
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14. In ozone Degradation which element act as catalyst?

  • (A) Chlorine
  • (B) Flurine
  • (C) Oxygen
  • (D) Potassium
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ID- 11337

15. Environment (Protection) Act came into force in?

  • (A) 1986
  • (B) 1989
  • (C) 1992
  • (D) 1993
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EXPLANATION:

Environment Protection Act, 1986 is an Act of the Parliament of India. It was enacted in May 1986 and came into force on 19 November 1986. It has 26 sections and 4 chapters.

Therefore, option A is correct.

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16. Bhopal gas tragedy of 1984 took place because methyl isocyanate reacted with:

  • (A) DDT
  • (B) Ammonia
  • (C) CO2
  • (D) Water
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17. Fluoride pollution mainly affect:

  • (A) Teeth
  • (B) Kidney
  • (C) Brain
  • (D) Heart
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ID- 11340

18. Nutrients enrichment of water bodies causes:

  • (A) Stratification
  • (B) Eutrophication
  • (C) Succession
  • (D) None of these
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19. Increased skin cancer and high mutation rate are due to:

  • (A) Acid Rain
  • (B) Ozone Depletion
  • (C) CO2 Pollution
  • (D) CO Pollution
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20. Minimata disease is caused by:

  • (A) By Chromium
  • (B) By Cadmium
  • (C) By Methyl mercury
  • (D) By Radioactive elements
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ID- 11343
BSEB, 2020 (A)

21. Rain is called acid rain, its ph is below:

  • (A) 7
  • (B) 6.5
  • (C) 6
  • (D) 5.6
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ID- 11344
BSEB, 2015

22. Pollution of SO2 destroys:

  • (A) Lichen
  • (B) Fungi
  • (C) Algae
  • (D) Fishes
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ID- 11345

23. Act formulated in 1986 was:

  • (A) Insecticide Act
  • (B) Environment (Protection) Act
  • (C) Water Prevention and Control of Pollution Act
  • (D) All of above
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24. Compressed Natural Gas (CNG) is:

  • (A) Propane
  • (B) Methane
  • (C) Ethane
  • (D) Butane
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ID- 11347
BSEB, 2020 (A)

25. World's most problematic aquatic weed is:

  • (A) Azolla
  • (B) Wolffia
  • (C) Eichornia
  • (D) Trapa
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ID- 11348
BSEB, 2020 (A)

26. Which of the following causes biomagnification?

  • (A) SO2
  • (B) Mercury
  • (C) DDT
  • (D) Both 'B' & 'C'
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ID- 11349

27. The green scum seen in the fresh water bodies is:

  • (A) blue green algae
  • (B) red algae
  • (C) green algae
  • (D) Both 'A' & 'C'
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ID- 11350

28. The major source of noise pollution, world wide is due to:

  • (A) office equipment
  • (B) transport system
  • (C) sugar textile and paper industries
  • (D) oil refineries and thermal power plants
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ID- 11351
BSEB, 2018 (C)

29. 'Green Muffler' is used against which type of pollution?

  • (A) Soil
  • (B) Water
  • (C) Air
  • (D) Sound
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ID- 11463
BSEB, 2018 (C)

30. Which of the following International Treaty was signed to control the emission of ozone depleting substances?

  • (A) Montreal
  • (B) Ramsar
  • (C) Bahai
  • (D) None of these
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31. Motor vehicles equipped with catalytic converter and advised to use unleaded petrol because:

  • (A) lead is a heavy metal
  • (B) lead causes inactivation of catalyst
  • (C) lead decreases the efficiency of vehicle
  • (D) lead increases burning of petrol
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ID- 11466

32. Catalytic converters, which are fitted into automobiles for reducing the emission of poisonous gases possess which of the following metals as catalyst?

  • (A) Platinum-Pladium
  • (B) Rhodium
  • (C) Lead
  • (D) Both (A) and (B)
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ID- 11467

33. Which of the following is the way to control vehicular air-pollution in India cities?

  • (A) Use of CNG as fuel
  • (B) Use of unleaded petrol in the vehicles
  • (C) Use of catalytic converter in the vehicles
  • (D) All of these
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34. Which of the following is the most dangerous metal pollutant of automobile exhaust?

  • (A) Cadmium
  • (B) Copper
  • (C) Mercury
  • (D) Lead
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ID- 11471
BSEB, 2016

35. Lichens are the indicators of:

  • (A) water pollution
  • (B) air (SO2) pollution
  • (C) soil pollution
  • (D) all of these
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ID- 11473

36. Chlorofluorocarbons are air polluting agents which are produced by:

  • (A) diesel trucks
  • (B) jet planes
  • (C) rice fields
  • (D) cellphones
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ID- 11475

37. The term 'terror of Bengal' is used for:

  • (A) algal bloom
  • (B) Eichhornia crassipes
  • (C) Increased biochemical oxygen demand
  • (D) eutrophication
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ID- 11477

38. Which of the following is referred to as the world's most problematic aquatic weed?

  • (A) Abelmoschus esculentus
  • (B) Eichhornia crassipes
  • (C) Parthenium hysterophorus
  • (D) Planktonic algae
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ID- 11480

39. Accelerated eutrophication occurs due to:

  • (A) increase in amount of dissolved oxygen
  • (B) disposal of waste rich in nitrates and phosphates
  • (C) increase in concentration of DDT and mercury in water
  • (D) unsafe disposal of radioactive wastes
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40. Contamination of water with sewage is indicated by cysts of:

  • (A) Escherichia
  • (B) Entamoeba
  • (C) Pseudomonas
  • (D) Leishmania
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ID- 11486

41. Peroxyacyl nitrates (PAN) are formed through photochemical reactions between:

  • (A) Sulphur oxides and hydrocarbons
  • (B) nitrogen oxides and hydrocarbons
  • (C) nitrogen oxides and O3
  • (D) CFCI3 and O3
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ID- 11514

42. Escherichia coil is use as an indicator organism to determine pollution of water with:

  • (A) industrial effluents
  • (B) heavy metals
  • (C) pollen of aquatic plants
  • (D) faecal matter
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ID- 11515

43. Phosphate pollution is brought about by:

  • (A) phosphate rocks
  • (B) automobile exhausts
  • (C) sewage and phosphate rocks
  • (D) sewage and agricultural fertilizers
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44. Which among the following in likely to have the highest level of DDT deposition in its body?

  • (A) Sea gull
  • (B) phytoplankton
  • (C) Eel
  • (D) Crab
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45. A disease caused by eating fish contaminated by industrial waste, containing mercury compounds is called as:

  • (A) Osterosclerosis
  • (B) Hashimoto's disease
  • (C) Bright's disease
  • (D) Minamata disease
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46. A prolonged exposure to noise at 95 db can produce:

  • (A) respiratory trouble
  • (B) skin cancer
  • (C) nervous tension and increased blood pressure
  • (D) digestive system
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ID- 11519

47. Green muffler scheme help to reduce:

  • (A) air pollution
  • (B) noise pollution
  • (C) e-wastes
  • (D) both A and B
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ID- 11520

48. Noise pollution may cause nervousness and irritability by stimulating the secretion of:

  • (A) thyroid hormone
  • (B) adernaline hormone
  • (C) parathyroid hormone
  • (D) none of these
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49. Polyblend is:

  • (A) a mixture of two different types of plastics
  • (B) a fine powder of recycled modified plastic
  • (C) A blend of plastic and bitumen
  • (D) none of these
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50. Which of the following isotopes is most dangerous to Human beings?

  • (A) Phosphorus-32
  • (B) Strontium-90
  • (C) Caesium-137
  • (D) Iodine-131
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ID- 11523

51. If there is no greenhouse effect, the average temperature at surface of earth would have been:

  • (A) 15°C
  • (B) –18°C
  • (C) –6°C
  • (D) 10°C
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ID- 11524

52. Greenhouse effect is due to:

  • (A) accumulation of O3 and depletion of CO2
  • (B) accumulation of both O3 and CO2
  • (C) accumulation of CO2 and depletion of O3
  • (D) presence of green plants on the earth
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ID- 11525

53. Earth Summit, 1992 to for the biodiversity conservation was held at:

  • (A) Rio-de-Janeiro, Brazil
  • (B) Johannesburg, S. Africa
  • (C) Kyoto, Japan
  • (D) Rio-de-Janeiro, Geneva
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ID- 11526

54. A mutagenic pollutant is:

  • (A) Organophosphate
  • (B) Resins
  • (C) Hydrocarbons
  • (D) Nitrogen oxides
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ID- 11527

55. Montreal Protocol is associated with

  • (A) control of emission of ozone depletion substances
  • (B) control of radioactive wastes
  • (C) control of desertification
  • (D) protection and management of forests
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ID- 11528

56. Which of the following can cause DNA damage and mutations in humans?

  • (A) Absorption of UV-A and UV-B
  • (B) Absorption of UV-B
  • (C) Absorption of UV-A
  • (D) Absorption of UV-A and UV-C
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ID- 11529

57. The concept of Joint Forest management (JFM) involves:

  • (A) conservation of forest and agricultural land by the government
  • (B) Conservation of forests and wild life by the local communities
  • (C) work in close association with the local communities for protecting and managing forests
  • (D) exploitation of beneficial forest products only
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58. According to the Central Pollution Control Board, particles that are responsible for causing great harm to human health are of diameter:

  • (A) 2.50 micrometers
  • (B) 5.00 micrometers
  • (C) 10.00 micrometers
  • (D) 7.5 micrometers
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59. The material generally used for sound proofing of rooms like a recording studio and auditorium, etc. is:

  • (A) cotton
  • (B) coir
  • (C) wood
  • (D) styro foam
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60. The expanded form of DDT is:

  • (A) dichloro diphenyl trichloroethane
  • (B) dichloro diethyl trichloroethane
  • (C) dichloro dipyrydrl trichloroethane
  • (D) dichloro diphenyl tetrachloroacetate
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ID- 11533

61. Which of the following material takes the longest time for biodegradation?

  • (A) Cotton
  • (B) Paper
  • (C) Bone
  • (D) Jute
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ID- 11534

62. The green scum screen in the fresh water bodies is:

  • (A) blue green algae
  • (B) red algae
  • (C) green algae
  • (D) Both (A) and (C)
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ID- 11535

63. The loudness of a sound that a person can withstand without discomfort is about:

  • (A) 150 db
  • (B) 215 db
  • (C) 30 db
  • (D) 80 db
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64. Indicator of SO2 pollution is:

  • (A) Algae
  • (B) Lichen
  • (C) Fungi
  • (D) All of these
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ID- 11537

65. Catalytic converters are fitted into automobiles to reduce emission of harmful gases. Catalytic converters change unburnt hydrocarbons into:

  • (A) carbon dioxide and water
  • (B) carbon monoxide
  • (C) methane
  • (D) carbon dioxide and methane
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ID- 11538

66. Why is it necessary to remove sulphur from petroleum products?

  • (A) Tu reduce the emission of sulphur dioxide in exhaust fumes.
  • (B) Tu increase efficiency of automobiles engines
  • (C) To use sulphur removed from petroleum for commercial purposes
  • (D) To increase the life span of engine silencers
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67. Which one of the following impurities is easiest to remove from wastewater?

  • (A) Bacteria
  • (B) Colloids
  • (C) Dissolved solids
  • (D) Suspended solids
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ID- 11540

68. Which one of the following diseases is not due to contamination of water?

  • (A) Hepatitis-B
  • (B) Jaundice
  • (C) Cholera
  • (D) Typhoid
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ID- 11541

69. Nuisance growth of aquatic plant and blooms-forming algae in natural water is generally due to high concentrations of:

  • (A) carbon
  • (B) sulphur
  • (C) calcium
  • (D) phosphate
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70. Algal blooms impart a dinstinct colour to water due to:

  • (A) their pigments
  • (B) excretion of coloured substances
  • (C) formation of coloured chemicals in water facilitated by physiological degradation of algae
  • (D) absorption of light by algae cell wall
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ID- 11681
BSEB, 2016

71. Factors of acid rain are:

  • (A) CO and CO2
  • (B) NO2 and SO2
  • (C) CO2 and NO2
  • (D) N2 and NO3
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ID- 11684
BSEB, 2016

72. Lichen is indicators of:

  • (A) CO2 pollution
  • (B) SO2 pollution
  • (C) CO pollution
  • (D) Water pollution
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ID- 11687
BSEB, 2016

73. Generally threshold of sound intensity for human is:

  • (A) 20-30 decibel
  • (B) 80-90 decibel
  • (C) 120-130 decibel
  • (D) 140-150 decibel
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ID- 11690
BSEB, 2017 (A), 2017 (C)

74. World Environment day is celebrated on:

  • (A) 5th June
  • (B) 20th December
  • (C) 15th March
  • (D) 7th July
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ID- 11692
BSEB, 2017 (A), 2021 (C)

75. The safe Noise level fixed by WHO is:

  • (A) 20-30 decibel
  • (B) 45 decibel
  • (C) 75 decibel
  • (D) 90 decibel
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EXPLANATION:

  • Noise is measured in decibels. Experts believe that continuous noise levels in excess of 90 decibels can cause loss of hearing and irreversible changes in nervous systems.
  • The World Health Organization [WHO] has fixed 45 decibels as the safe noise level for a city.

Therefore, option B is correct.

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ID- 11694
BSEB, 2018 (A)

76. Which of the following is green house gas?

  • (A) Methane
  • (B) Co2
  • (C) Chloro fluoro Carbon
  • (D) All of these
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ID- 11696
BSEB, 2018 (A)

77. The thickness of Ozone in a column of air form the ground to the top of atmosphere is measured in terms of:

  • (A) Dobson unit
  • (B) Arab unit
  • (C) Pascal unit
  • (D) None of these
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BSEB, 2018 (A), 2020 (A)

78. Protochemical smog consists of:

  • (A) SO2, PAN and Smoke
  • (B) Ozone, PAN and NO2
  • (C) Ozone, SO2 & Hydrocarbon
  • (D) SO2, CO2 and Hydrocarbon
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