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Air, Water & We...

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  • Question 1
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    Which of the following gases is required in the process of photosynthesis?

  • Question 2
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    Air exerts pressure in

  • Question 3
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    Which of the following gases is used in light bulbs?

  • Question 4
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    Which of the following causes air pollution?

  • Question 5
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    Which layer of atmosphere contains the ozone layer?

  • Question 6
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    Which of the following property of air is used in the brake mechanisms of train?

  • Question 7
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    Which of the following turns lime water milky?

  • Question 8
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    Which of the following plays an important part in the formation of coal?

  • Question 9
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    Which of the following is called dry ice?

  • Question 10
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    What is the full form of LPG?

  • Question 11
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    Mountaineers carry oxygen cylinders with them because____

  • Question 12
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    Which of the following is used to generate electricity by wind-power?

  • Question 13
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    Which of the following gases is responsible for global warming?

  • Question 14
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    An animal is kept in an air tight jar. After some time, it was found that the animal was struggling to remain alive and its movements were reduced. Why?

  • Question 15
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    Which of the following gases is released by denitrifying bacteria?

  • Question 16
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    How do animals, fishes and plants live without air, under water?

  • Question 17
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    Nitrogen is utilized by plants for

  • Question 18
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    Which of the following is used as catalyst, during photosynthesis?

  • Question 19
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    Which of the following statements is not true, regarding the properties of air?

  • Question 20
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    Which of the following gases protect us from the harmful ultraviolet rays of the earth?

  • Question 21
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    The humidity of a place

  • Question 22
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    Which of the following plays an important part while drinking a liquid with a straw?

  • Question 23
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    Which scientist discovered carbon dioxide first, in 1630?

  • Question 24
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    Which of the following gases is acidic in nature?

  • Question 25
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    Which of the following statement is not true, about the balance of components in air?

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