8th Class Science Pollution of Air and Water Question Bank

done Pollution of Air and Water Total Questions - 35

• question_answer1)
  The pie chart given below shows the composition of different gases in air. Identify gases W, X and Y
  A)

  W	X	Y
  Nitrogen	Rare gases	Oxygen

  done clear
  B)
                        

  W	X	Y
  Carbon	Oxygen	Rare gases

                  done clear
  C)
                        

  W	X	Y
  Nitrogen	Oxygen	Rare gases

                  done clear
  D)
                        

  W	X	Y
  Rare gases	Hydrogen	Oxygen

  done clear
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• question_answer2)
  Which of the following air pollutants is wrongly matched with the effect it causes?
  A)
   Dust - reduces photosynthesis in green plants. done clear
  B)
  Carbon monoxide - reduces oxygen in the blood. done clear
  C)
  Chlorofluorocarbons - damages nerves and tissues. done clear
  D)
  Nicotine - hardens and narrows blood vessels. done clear
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• question_answer3)
  Which of the following does NOT cause air pollution?
  A)
   Increasing forest reserves done clear
  B)
                                          Using pesticides in farms done clear
  C)
                                          Developing housing estates done clear
  D)
                                          Quarrying for limestone done clear
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• question_answer4)
  Which of the following is NOT a general pollutant of atmosphere?
  A)
  \[C{{O}_{2}}\]                                    done clear
  B)
                         \[S{{O}_{2}}\]                                    done clear
  C)
                         \[S{{O}_{3}}\]                                    done clear
  D)
                         \[N{{O}_{2}}\] done clear
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• question_answer5)
  Identify the gas associated with greenhouse effect.              
  A)
                 Carbon dioxide               done clear
  B)
                                                                          Oxygen               done clear
  C)
                                            Nitrogen dioxide               done clear
  D)
                                            Sulphur dioxide done clear
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• question_answer6)
  What is the outcome of the release of carbon particles and smoke from factories?
  A)
                   Increases the rate of respiration in plants.               done clear
  B)
                            Decreases the rate of photo- synthesis in plants. done clear
  C)
                          Increases the absorption of carbon dioxide by plants. done clear
  D)
                          Decreases the rate of transpiration in plants. done clear
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• question_answer7)
  A Which of the following gases can result in the formation of acid rain?
  A)
                           Ozone                 done clear
  B)
                                          Carbon monoxide                 done clear
  C)
                                          Sulphur dioxide                 done clear
  D)
                                          Chlorofluorocarbon done clear
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• question_answer8)
         Heat is reflected from the earth's surface and trapped in the atmosphere. Which phenomena is being referred to?
  A)
                   Global warming               done clear
  B)
                                            Ozone depletion               done clear
  C)
                                            Greenhouse effect               done clear
  D)
                                            Thermal pollution done clear
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• question_answer9)
  Which of the water pollutants is INCORRECTLY paired with the source?
  A)
                   Oil spill-ship               done clear
  B)
                                            Pesticide - oil palm plantation               done clear
  C)
                                            Sewage ? factories               done clear
  D)
                                            Nitrate ? farm done clear
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• question_answer10)
   Which of the following gases is regarded as an atmospheric pollutant?
  A)
  \[{{O}_{2}}\]                                      done clear
  B)
                          \[{{O}_{3}}\]                     done clear
  C)
                         \[S{{O}_{2}}\]                                    done clear
  D)
                          \[{{N}_{2}}\] done clear
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• question_answer11)
  What is the effect of sulphur dioxide present in air on human beings?
  A)
   Harms the skin and the lungs done clear
  B)
                          Mixes with the blood and prevents it from carrying oxygen done clear
  C)
                          Affects the heart and the liver done clear
  D)
                          Raises the air temperature done clear
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• question_answer12)
  How are lead particles released into the air?
  A)
   By burning coal in thermal power stations done clear
  B)
                          By burning petrol in automobiles done clear
  C)
                          By burning biomass in chullahs done clear
  D)
                          By burning LPG for cooking done clear
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• question_answer13)
  From which of the following bad effects does the ozone layer in our atmosphere protect us?
  A)
   Carbon dioxide done clear
  B)
                          CFC's done clear
  C)
                          The sun's ultraviolet rays done clear
  D)
                          All of the above done clear
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• question_answer14)
  How are monuments of marble destroyed?
  A)
                   By sulphur dioxide pollution.                 done clear
  B)
                                          By carbon monoxide pollution.                 done clear
  C)
                                          By pesticide pollution.                 done clear
  D)
                                          By dust particles. done clear
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• question_answer15)
  Which of the major sources of air pollution contributes pollutants like chlorofluorohydrocarbons?
  A)
                   Industrial effluents                 done clear
  B)
                                          Aerosols                 done clear
  C)
                                          Sewage pollutants                 done clear
  D)
                                          All of the above done clear
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• question_answer16)
  Which of these is the major air pollutant in cities like Delhi and Kolkata?
  A)
   Carbon monoxide done clear
  B)
                          Hydrocarbons done clear
  C)
                          Suspended particulate matter done clear
  D)
                          Oxides of nitrogen done clear
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• question_answer17)
  Which of the following applications use catalytic converters?
  A)
   Automobiles     done clear
  B)
                          Windmills                           done clear
  C)
                          Poultry farms    done clear
  D)
                          Dairy farms done clear
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• question_answer18)
  What is smog?
  A)
   A combination of fire and water. done clear
  B)
                                          A combination of smoke and fog.                 done clear
  C)
                                          A combination of water and smoke.                 done clear
  D)
                                          A combination of air and water. done clear
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• question_answer19)
  If there is no\[C{{O}_{2}}\]in the atmosphere, what would happen to the earth's temperature?
  A)
                   It would be less than the present.                 done clear
  B)
                                          It would be the same as present.                 done clear
  C)
                                          It would be higher than the present.                 done clear
  D)
                                          It depends on the 0, content of air. done clear
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• question_answer20)
  Which of the following is NOT a feature of potable water?
  A)
                   Clean, colourless and odourless                 done clear
  B)
                                          Free from bacteria                 done clear
  C)
                          Have excessive sodium, calcium and magnesium done clear
  D)
                                          Having dissolved oxygen and carbon dioxide done clear
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• question_answer21)
  Which of the following pollutants is NOT present in the vehicular exhaust emissions?
  A)
                   Lead                 done clear
  B)
                                          Ammonia                 done clear
  C)
                                          Carbon monoxide                 done clear
  D)
                                          Particulate matter done clear
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• question_answer22)
  What is the main cause of pollution of water in India?
  A)
                   Discharge of untreated sewage                 done clear
  B)
                                          Bathing                 done clear
  C)
                                          Discharge of industrial waste                 done clear
  D)
                                          Both (A) and (C)                 done clear
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• question_answer23)
  In which part of atmosphere is ozone layer present?
  A)
                   Stratosphere                    done clear
  B)
                                          Troposphere                                     done clear
  C)
                                          Mesosphere                                     done clear
  D)
                                          Thermosphere done clear
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• question_answer24)
  What is the main cause of sulphur dioxide emissions?
  A)
   Agricultural farms done clear
  B)
                          Petroleum refineries done clear
  C)
                          Thermal Power plants done clear
  D)
                          Water resources done clear
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• question_answer25)
  Which of these steps when adopted will contribute towards better waste management?
  A)
   Reduce the amount of waste formed done clear
  B)
                          Reuse the waste done clear
  C)
                          Recycle the waste done clear
  D)
                          All of the above done clear
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• question_answer26)
  Which of the following, will NOT help in reducing air pollution?
  A)
   Burn household rubbish in incinerators. done clear
  B)
                          Use catalytic converters in motor vehicles. done clear
  C)
                          Fix electric precipitators to factory chimneys. done clear
  D)
                          Ban smoking in public places such as in cinema theatres. done clear
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• question_answer27)
  Which of the following is due to global warming?

  (i) An increase in the water level in the sea

  (ii) The melting of snow on mountain peaks

  (iii) A decrease in food production by plants

  A)
                   Only (i) and (ii)                 done clear
  B)
                                          Only (ii) and (iii)                 done clear
  C)
                                          Only (i) and (iii)                 done clear
  D)
                                          (i), (ii) and (iii)                 done clear
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• question_answer28)
  Which of these is the bio-indicator of air pollution?
  A)
   Algae                                    done clear
  B)
                                          Ferns    done clear
  C)
                          Mushrooms                      done clear
  D)
                          Lichens done clear
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• question_answer29)
  What does the term 'conserving the 'environment' mean?
  A)
   Not allowing man and animal from using natural resources done clear
  B)
                          Not lowering the quality of the environment done clear
  C)
                          Changing natural resources from their original state done clear
  D)
                          Preserving nature that has been destroyed done clear
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• question_answer30)
  How can pollution from the burning of fossil fuels be reduced?

  (i) By using an incinerator.

  (ii) By using renewable sources of energy.

  (iii) By fixing catalytic converters in vehicles.

                 
  A)
                   Only (i) and (ii)                 done clear
  B)
                                          Only (ii) and (iii)                 done clear
  C)
                                          Only (i) and (iii)                 done clear
  D)
                                          (i), (ii) and (iii) done clear
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• question_answer31)
  What is caused, if carbon dioxide is released into the air?
  A)
                   Acid rain                 done clear
  B)
                                          Eutrophication                 done clear
  C)
                                          Global warming                 done clear
  D)
                                          Respiratory problems                 done clear
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• question_answer32)
  How is sewage water purified for recycling?
  A)
                   By the action of fish.                 done clear
  B)
                                          By the action of microorganisms.                 done clear
  C)
                                          By the action of fuels.                 done clear
  D)
                          By the action of non-biodegradable chemicals. done clear
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• question_answer33)
  What is the trapping of heat radiations by earth's atmosphere known as?
  A)
                   Global warming                 done clear
  B)
                                          Marble cancer                 done clear
  C)
                                          Greenhouse effect                 done clear
  D)
                                          Ozone hole                 done clear
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• question_answer34)
  What are the effects of discharging excess heat from electrical power stations into rivers and lakes?                

  (i) The biological oxygen demand value of the water decreases

  (ii) Instant death of certain organism

  (iii) The population of algae increases

  (iv) The concentration of dissolved oxygen increases

                 
  A)
   Only (i) and (ii) done clear
  B)
                          Only (ii) and (iii) done clear
  C)
                          Only (i), (ii) and (iii) done clear
  D)
                          Only (i),(ii) and (iv) done clear
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• question_answer35)
  Which of the following is NOT an air pollutant?
  A)
   \[{{N}_{2}}\]     done clear
  B)
                                                         \[{{N}_{2}}O\]                   done clear
  C)
                          \[NO\]                                 done clear
  D)
                          \[CO\] done clear
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