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Air, Water & Weather Test - 2

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Air, Water & Weather Test - 2
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following gases is required in the process of photosynthesis?
    Solution
    Carbon dioxide is required in the process of photosynthesis. Plants prepare their food with the help of carbon dioxide, water and sunlight and release oxygen.
  • Question 2
    1 / -0
    Air exerts pressure in
    Solution
    Air exerts pressure in all the directions.
  • Question 3
    1 / -0
    Which of the following gases is used in light bulbs?
    Solution
    Argon gas is used in electric lamps.
  • Question 4
    1 / -0
    Which of the following causes air pollution?
    Solution
    Burning of fossil fuels is the main cause of air pollution.
    All the other options like measures to reduce smoke, planting trees, using unleaded petrol and using catalytic converters are methods to reduce pollution.

  • Question 5
    1 / -0
    Which layer of atmosphere contains the ozone layer?
    Solution
    Stratosphere contains the ozone layer and extends beyond the troposphere.
    The layer of the stratosphere with the highest concentration of ozone molecules, is also called ozonosphere.
  • Question 6
    1 / -0
    Which of the following property of air is used in the brake mechanisms of train?
    Solution
    Brake mechanism of train works on the compressed air.
  • Question 7
    1 / -0
    Which of the following turns lime water milky?
    Solution
    Carbon dioxide turns lime water milky.
  • Question 8
    1 / -0
    Which of the following plays an important part in the formation of coal?
    Solution
    The cellulose of the plants is acted upon by bacteria, which removes the hydrogen and oxygen from the cellulose, leaving a residue rich in carbon which is known as coal.
  • Question 9
    1 / -0
    Which of the following is called dry ice?
    Solution
    Solid carbon dioxide is known as dry ice.
  • Question 10
    1 / -0
    What is the full form of LPG?
    Solution
    Yes, the full form of the LPG is liquefied petroleum gas.
  • Question 11
    1 / -0
    Mountaineers carry oxygen cylinders with them because____
    Solution
    The air gets thinner as we go higher up towards space. When mountaineers climb very high peaks, they face Oxygen shortage due to less dense air and due to the efforts being put in climbing, the need of their body increases .
  • Question 12
    1 / -0
    Which of the following is used to generate electricity by wind-power?
    Solution
    Yes, wind mill can be used to generate electricity.
  • Question 13
    1 / -0
    Which of the following gases is responsible for global warming?
    Solution
    Carbon dioxide has the property of absorbing heat. It traps the Earth's heat, as a result the temperature of the Earth's surface increases, resulting in global warming.
  • Question 14
    1 / -0
    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?
    Solution
    As we know, during respiration, oxygen is inhaled and carbon dioxide is exhaled. The animal, which was kept in the air tight jar, exhaled carbon dioxide and inhaled oxygen. After some time, all the oxygen of the jar was inhaled by the animal and carbon dioxide was exhaled, so the jar is filled with the carbon dioxide and there is a lack of oxygen, as a result the movements of the animal have reduced.
  • Question 15
    1 / -0
    Which of the following gases is released by denitrifying bacteria?
    Solution
    Nitrogen is released by denitrifying bacteria.
  • Question 16
    1 / -0
    How do animals, fishes and plants live without air, under water?
    Solution
    Yes, gases which are dissolved in the water, enable plants and animals to live.
  • Question 17
    1 / -0
    Nitrogen is utilized by plants for
    Solution
    Nitrogen is utilized by plants for protein synthesis, which is essential for growth and development of the plants.
  • Question 18
    1 / -0
    Which of the following is used as catalyst, during photosynthesis?
    Solution
    Chlorophyll is used as catalyst during photosynthesis.
  • Question 19
    1 / -0
    Which of the following statements is not true, regarding the properties of air?
    Solution
    No, air is a bad conductor of electricity.
  • Question 20
    1 / -0
    Which of the following gases protect us from the harmful ultraviolet rays of the earth?
    Solution
    Ozone layer prevents us from the ultraviolet radiations of the sun.
  • Question 21
    1 / -0
    The humidity of a place
    Solution
    Humidity of a place is due to water vapours present in the atmosphere, which always vary from time to time.
  • Question 22
    1 / -0
    Which of the following plays an important part while drinking a liquid with a straw?
    Solution
    While drinking liquid with a straw, atmospheric pressure plays an important role.
  • Question 23
    1 / -0
    Which scientist discovered carbon dioxide first, in 1630?
    Solution
    Van Helmont discovered carbon dioxide in 1630.
  • Question 24
    1 / -0
    Which of the following gases is acidic in nature?
    Solution
    Carbon dioxide is slightly acidic in nature.
  • Question 25
    1 / -0
    Which of the following statement is not true, about the balance of components in air?
    Solution
    It is a wrong statement, because carbon dioxide is released by volcanic eruptions and not removed by it.
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