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Pollution of Air and Water Test - 31

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Pollution of Air and Water Test - 31
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  • Question 1
    1 / -0
    Acid rain:
    Solution
    Acid rain is very harmful as it reduces the fertility of soil, affects vegetation and can inflicts damages on many structures and monuments.  
  • Question 2
    1 / -0
    Which of the following is true about acid rain?
    Solution
    Acid rain damages buildings by reacting with the chemicals in the building material. It also makes the soil acidic and reduces its fertility by making it less suitable for growing crops.
  • Question 3
    1 / -0
    Harmful gases like $$SO_2$$, which harm the Taj Mahal are present in:
    Solution
    Industries release $$SO_2$$ which causes air pollution. It reacts with water to form acid rain. This acid rain affects the marble of the Taj Mahal and harms it by corrosion.
  • Question 4
    1 / -0
    Which of the following is correct about acid rain?
    Solution
    When oxides of sulphur and nitrogen which are emitted by the industries, react with the moisture present in the atmosphere, they form acids.
    Thus, these acids reduce the pH of the rain falling on the Earth and hence acid rain is acidic in nature.
    $$pH$$ of acid  rain is 5.5
    Hence, correct answer is option $$A$$.
  • Question 5
    1 / -0
    Acid rain is a mixture of:
  • Question 6
    1 / -0
    Among the following, which is a greenhouse gas?
    Solution

    $$H_2O$$ vapour or water vapour is a potent greenhouse gas just like carbon dioxide and methane.
  • Question 7
    1 / -0
    Water can be purified by adding:
    Solution
    Adding chlorine is one method of purifying water as it kills bacteria and other disease causing germs.
  • Question 8
    1 / -0

    Drinking water can be filtered by:

    Solution
    Drinking water can be filtered by sedimentation (removal of impurities by gravity), filtration (removal of impurities by permeable membranes) and chlorination (use of chlorine as a disinfectant).
  • Question 9
    1 / -0

    The chemical method used for the purification of water is:

    Solution
    Chlorination is a commonly used chemical method for purifying water. It is done by adding chlorine tablets or bleaching powder to the water. We should not use more chlorine tablets than specified.
  • Question 10
    1 / -0
    What is the main source of global warming?
    Solution
    The main source of global warming is carbon dioxide. It causes global warming by trapping heat.
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