6th Class Science Air Around us Question Bank

done Air around us Total Questions - 50

• question_answer1)
  Which of the following processes need oxygen?                           
  A)
   Combustion   done clear
  B)
          Respiration     done clear
  C)
          Oxidation     done clear
  D)
          All of the above done clear
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• question_answer2)
  Which of the following statements is true regarding the earth's atmosphere?
  A)
   It gets denser with an increase in the altitude.                           done clear
  B)
          It gets thinner with an increase in the altitude. done clear
  C)
          It remains the same. done clear
  D)
          It contains no solid particles. done clear
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• question_answer3)
  When we heat water, we find bubbles coming from it. This shows that
  A)
   water contains air. done clear
  B)
          air contains water. done clear
  C)
          water itself converts into bubbles. done clear
  D)
          water contains dissolved minerals. done clear
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• question_answer4)
  Which of the following plays a very important role in the oxygen cycle?
  A)
   Birds                     done clear
  B)
          Animals                               done clear
  C)
          Plants                                   done clear
  D)
          Soil done clear
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• question_answer5)
  Mountaineers carry oxygen cylinders with them because
  A)
   oxygen supports combustion. done clear
  B)
          oxygen is less at higher altitudes. done clear
  C)
          more oxygen is needed to cook food. done clear
  D)
          oxygen does not support combustion. done clear
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• question_answer6)
  Which of the following can show the direction of the wind?
  A)
   An anemometer done clear
  B)
          A wind mill done clear
  C)
          A windvane done clear
  D)
          A barometer done clear
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• question_answer7)
  Which of the constituents of air on increasing, causes global warming?
  A)
   Nitrogen                             done clear
  B)
          Oxygen done clear
  C)
          Inert gases    done clear
  D)
          Carbon dioxide done clear
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• question_answer8)
  The percentage of water vapour present in air is called
  A)
   density.                               done clear
  B)
          humidity.                            done clear
  C)
          mass.                                   done clear
  D)
          solubility. done clear
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• question_answer9)
  Plants require nitrogen for
  A)
   reproduction. done clear
  B)
          photosynthesis. done clear
  C)
          transpiration. done clear
  D)
          their growth. done clear
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• question_answer10)
  Which of the following gases cause the harmful greenhouse effect?
  A)
   Hydrogen     done clear
  B)
          Oxygen done clear
  C)
          Carbon dioxide done clear
  D)
          Nitrogen done clear
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• question_answer11)
  The percentage of nitrogen in air is
  A)
   21%.                                     done clear
  B)
          0.1%.                    done clear
  C)
          54%.                                     done clear
  D)
          78%. done clear
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• question_answer12)
  Breathing of air through our mouth is not hygienic because
  A)
   dust particles will enter our lungs. done clear
  B)
          we will inhale more carbon dioxide. done clear
  C)
          our throat will become sore. done clear
  D)
          we will easily catch cold. done clear
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• question_answer13)
  Which of the following enables us to drink a liquid through a straw?
  A)
   Humidity done clear
  B)
          Temperature done clear
  C)
          Atmospheric pressure done clear
  D)
          Composition of air done clear
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• question_answer14)
  The humidity of a place
  A)
   lies between 10% - 20 %. done clear
  B)
          is always more than 50%. done clear
  C)
          is always less than 80%. done clear
  D)
          varies from time to time. done clear
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• question_answer15)
  Lime water turns milky when exposed to air. This shows that air contains
  A)
   carbon dioxide. done clear
  B)
          hydrogen. done clear
  C)
          nitrogen.      done clear
  D)
          oxygen. done clear
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• question_answer16)
  The correct ascending order of gases as per their composition in air is
  A)
   oxygen < carbon dioxide < nitrogen. done clear
  B)
          hydrogen < oxygen < nitrogen. done clear
  C)
          nitrogen < hydrogen < oxygen. done clear
  D)
          oxygen < carbon dioxide < hydrogen. done clear
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• question_answer17)
  Air is useful for
  A)
   generating electricity. done clear
  B)
          the dispersal of seeds. done clear
  C)
          bird's flight. done clear
  D)
          all of the above. done clear
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• question_answer18)
  Which of the following is combustible?
  A)
   Oxygen       done clear
  B)
          Carbon dioxide done clear
  C)
          Hydrogen     done clear
  D)
          All of these done clear
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• question_answer19)
  Which of the following statements is true regarding the properties of air?
  A)
   Air is a good conductor of electricity. done clear
  B)
          Air is a good conductor of heat. done clear
  C)
          Air is translucent in nature. done clear
  D)
          The composition of air varies from place to place. done clear
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• question_answer20)
  Match the following terms in Column-l with those in Column-II correctly.

  Column-I		Column-II
  a.	Aquatic animals	1.	Sail boat
  b.	Mountaineers	2.	Soot and dust
  c.	Factories	3.	Oxygen cylinders
  d.	Wind	4.	Dissolved oxygen

  A)
   \[a-1,b-2,c-3,d-4\] done clear
  B)
          \[a-2,b-1,c-4,d-3\] done clear
  C)
          \[a-3,b-4,c-1,d-2\] done clear
  D)
          \[a-4,b-3,c-2,d-1\] done clear
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• question_answer21)
  Which of the following is NOT associated with air?
  A)
   Having a campfire done clear
  B)
          Flying a paper aeroplane done clear
  C)
          Blowing out candles on a birthday cake done clear
  D)
          Sunbathing at the beach done clear
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• question_answer22)
  The proportion of oxygen and carbon dioxide in the atmosphere is maintained by
  A)
   plants.        done clear
  B)
          animals. done clear
  C)
          machines.     done clear
  D)
          Both (a) and (b). done clear
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• question_answer23)
  What can be said about the nature of air?
  A)
   Air is heterogeneous. done clear
  B)
          Air is a compound. done clear
  C)
          Air is homogeneous. done clear
  D)
          Air is an alloy. done clear
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• question_answer24)
  Which of the choices can best fill in the boxes I and II given below?
  A)
   l-carbon dioxide, II-oxygen done clear
  B)
          l-oxygen, II-respiration done clear
  C)
          l-respiration, II-carbon dioxide done clear
  D)
          l-respiration, II-oxygen done clear
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• question_answer25)
  Rita fixed a candle at the bottom of a trough containing water. After lighting the candle, she inverted a gas jar over it. What did she observe?
  A)
   The flame continued to burn and water rose in the jar. done clear
  B)
          The flame was put off and water rose in the jar. done clear
  C)
          The flame continued to burn and water became milky. done clear
  D)
          The flame was put off and black smoke was deposited on the sides of the jar. done clear
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• question_answer26)
  Wind mills produce energy and convert it into
  A)
   heat energy.   done clear
  B)
          light energy. done clear
  C)
          sound energy. done clear
  D)
          electrical energy. done clear
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• question_answer27)
  What is the percentage of carbon dioxide present in air?
  A)
   0.3%                                     done clear
  B)
          0.03%   done clear
  C)
          0.003%                                 done clear
  D)
          1% done clear
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• question_answer28)
  Which of the following activities help in in- creasing the content of water vapour in air?
  A)
   Transpiration    done clear
  B)
          Evaporation done clear
  C)
          Respiration    done clear
  D)
          All of the above done clear
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• question_answer29)
  When a person is caught with fire, he or she is wrapped in a thick blanket so as to
  A)
   cut off the oxygen supply. done clear
  B)
          cut off the nitrogen supply. done clear
  C)
          keep the body cool. done clear
  D)
          cut off the inert gases supply. done clear
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• question_answer30)
  Air moves with great speed during
  A)
   drought. done clear
  B)
          cyclones. done clear
  C)
          volcanic eruptions. done clear
  D)
          floods.                            done clear
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• question_answer31)
  An animal placed in an air tight jar is kept in sunlight as shown in the figure. How can the animal be helped to survive for a longer time?
  A)
   By placing another mouse in it done clear
  B)
          By placing a green plant in it done clear
  C)
          By removing all the air through a vacuum pump done clear
  D)
          By placing a burning candle in it done clear
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• question_answer32)
  Given below are some applications of compressed air.

  (i) Tyres

  (ii) Sprayers

  (iii) Gas cylinders

    In which of the following is compressed air used?
  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_answer33)
  The amount of water vapour in air is greater in
  A)
   the rainy season. done clear
  B)
          the dry season. done clear
  C)
          the summer season. done clear
  D)
          the autumn season. done clear
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• question_answer34)
  In the given figure, a burning candle is kept in the trough containing water. It is put off after some time when covered by an inverted gas jar. What can be concluded from the above activity?
  A)
   Oxygen is 1/5th the volume of air. done clear
  B)
          The ratio of oxygen and nitrogen in air is 1 : 4. done clear
  C)
          Oxygen is required for burning the candle. done clear
  D)
          All of the above done clear
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• question_answer35)
  Which of the following gases is the component of air?
  A)
   Hydrogen     done clear
  B)
          Oxygen done clear
  C)
          Nitrogen      done clear
  D)
          All of the above done clear
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• question_answer36)
  Which of the following is the most abundant element in the earth's crust?
  A)
   Nitrogen                             done clear
  B)
          Oxygen                               done clear
  C)
          Silicon                                  done clear
  D)
          Hydrogen done clear
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• question_answer37)
  Which of the following activities releases carbon dioxide into the atmosphere?
  A)
   Respiration done clear
  B)
          Burning done clear
  C)
          Photosynthesis done clear
  D)
          Both (a) and (b) done clear
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• question_answer38)
  Which of the following gases when de-creased in the air causes breathing faster?
  A)
   Nitrogen      done clear
  B)
          Oxygen done clear
  C)
          Carbon dioxide done clear
  D)
          Inert gases done clear
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• question_answer39)
  Glass panes usually appear hazy because
  A)
   water vapour settles on tiny dust particles on glass surfaces. done clear
  B)
          chemical reactions take place on the glass surfaces. done clear
  C)
          it is the property of all transparent substances. done clear
  D)
          they have been used over a long time. done clear
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• question_answer40)
  Observe the given figure. What is the purpose of this experiment?
  A)
   To show that air has mass. done clear
  B)
          To show that air has oxygen. done clear
  C)
          To show that we can only feel air. done clear
  D)
          To show that air is compressible. done clear
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• question_answer41)
  Which of the following is true about air?

  (i) Air is a mixture of several gases.

  (ii) Air exerts pressure.

  (iii) The composition of air is constant in all places.

  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
  View Solution play_arrow

• question_answer42)
  In which of the following processes do plants require carbon dioxide?
  A)
   Photosynthesis done clear
  B)
          Transpiration done clear
  C)
          Growth done clear
  D)
          Reproduction done clear
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• question_answer43)
  Carbon dioxide gas can be tested by using

  (i) blue litmus paper.

  (ii) lime water.

  (iii) burning splinter.

  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_answer44)
  Which of the following gases in air helps burning?
  A)
   Oxygen       done clear
  B)
          Nitrogen done clear
  C)
          Carbon dioxide done clear
  D)
          Methane done clear
  View Solution play_arrow

• question_answer45)
  For which of the following processes is air essential?

  (i) Respiration

  (ii) Combustion

  (iii) Buring

  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_answer46)
  In an experiment shown by the class teacher, the side of the ruler which holds the inflated balloon dips as compared to the balloon without air. What is the conclusion drawn from this experiment?
  A)
   Balloon with air has greater force of gravity. done clear
  B)
          Air has definite mass. done clear
  C)
          Masses of the balloons are different. done clear
  D)
          Balloon has more matter than air. done clear
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• question_answer47)
  Which of the following methods need air?
  A)
   Hand picking done clear
  B)
          Sieving done clear
  C)
          Winnowing   done clear
  D)
          Filtration done clear
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• question_answer48)
  Which of the following can reduce air pollution on roads?
  A)
   The widening of roads. done clear
  B)
          Having more traffic lights on roads. done clear
  C)
          Having less traffic lights on roads. done clear
  D)
          Reducing the number of vehicles on roads. done clear
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• question_answer49)
  We cannot feel the pressure of atmosphere because
  A)
   pressure increases with decrease in altitude. done clear
  B)
          pressure decreases with increase in altitude. done clear
  C)
          pressure acts equally in all directions. done clear
  D)
          pressure difference between atmosphere and inside our body is small. done clear
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• question_answer50)
  Read the two sentences given in the box.

  (i) The compressed air in a tyre exerts a force large enough to lift a heavy car.

  (ii) In a syringe, the plunger compresses the liquid.

  A)
   Both the statements are true. done clear
  B)
          Both the statements are false. done clear
  C)
          Statement (i) is true but statement is false. done clear
  D)
          Statement (i) is false but statement (ii) is true. done clear
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