Self Studies
Self Studies
Self Studies
Self Studies
Selfstudy
Selfstudy

Environmental Issues Test - 19

Result Self Studies

Environmental Issues Test - 19
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0
    Which of the following is not a greenhouse gas?
    Solution
    Greenhouse gases are those gases that contribute to the greenhouse effect by absorbing infrared radiation. Water vapour, Carbon Monoxide, Methane and CFCs (chlorofluorocarbons) are Greenhouse gases. These gases leads to Greenhouse effect which is the process by which radiation from a planet's atmosphere warms the planet's surface to a temperature above what it would be without its atmosphere.
    Hence, the correct answer is  option D.
  • Question 2
    1 / -0
    CFC are not recommended to be used in refrigerators because they
    Solution
    Ozone depleting substances (ODS) are substances, which react with ozone present in the stratosphere and destroy the same. The major ODS are chlorofluorocarbons (14 percent of total depletion), nitrogen oxides (3 to 5 percent of total depletion), sulphur dioxides, halon, carbon tetrachloride, methane, methyl chloroform etc.
  • Question 3
    1 / -0
    Greenhouse effect is due to the presence of
    Solution
    The gases which are transparent to solar radiation but retain and partially reflect back long-wave heat radiations are called greenhouse gases. Greenhouse gases are essential for keeping the earth warm and hospitable. The various greenhouse gases are carbon dioxide (warming effect 60%), methane (warming effect 20%), chlorofluorocarbons or CFCs (warming effect 14 percent) and nitrous oxide (warming effect 6 percent). Other gases of minor importance are water vapour and ozone.
    So, the correct answer is option D.
  • Question 4
    1 / -0
    Measurement of the rate of oxygen consumption in unit volume of water over a period of time is done to find out

    Solution
    Decomposition of organic matter by microbes requires oxygen. Degree of impurity of water due to organic matter is measured in terms of 'Biological Oxygen Demand (BOD)'. BOD is the oxygen in milligrams required for 5 days in 1 litre of water at 20 degree centigrades for the microorganisms to metabolise organic wastes.
  • Question 5
    1 / -0
    If global warming continues, the organism which may face more severe threat is
    Solution
    Excess of greenhouse gases in the atmosphere like carbon dioxide, methane, chlorofluorocarbons etc., lead to global warming. Global warming will lead to melting of ice caps and melting of glaciers. Consequently, animals living at high altitudes or in frozen areas will face the threat to survival. Hence snow leopards which live in the Himalayan region are under threat. Thus, the correct answer is option C.
  • Question 6
    1 / -0
    Greenhouse effect refers to 
    Solution
        The greenhouse effect is a natural process that warms the Earth's surface. When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back to space and the rest is absorbed and re-radiated by greenhouse gases. The absorbed energy warms the atmosphere and the surface of the Earth.
        So, the correct answer is 'Warming of Earth'.
      • Question 7
        1 / -0
        The result of ozone hole is
        Solution
        • Ozone hole or thinning of ozone layer increases the amount of UV-B radiations reaching the earth. 
        • The increased ultraviolet radiation reaching the earth leads to increased disorders and UV radiations also inhibit photosynthesis leading to decreased productivity.
        So, the correct answer is option B.
      • Question 8
        1 / -0
        When harmful substances such as sewage, toxic chemicals get mixed with water, then:
        Solution
        When harmful substances such as sewage, toxic chemicals, silt, etc. get mixed with water, the water does not remain pure and its taste can change. It leads to situation where we say that the water is polluted. 
        Hence, option B is correct.
      • Question 9
        1 / -0
        The ozone layer in earth's atmosphere is crucial for human survival because it
        Solution
        An ozone layer, present in the stratosphere, reflects the ultraviolet rays emitted by the sun and thus it prevents us from skin diseases and mutation.
        So, the correct answer is option C.
      • Question 10
        1 / -0
        Some of the major contaminants of water are:
        Solution
        Sewage, agricultural chemicals, and industrial waste are some of the major contaminants of water. They are Soluble or insoluble forms, all of these release toxins and harmful chemicals in the water. 
      Self Studies
      User
      Question Analysis

      • Correct -

      • Wrong -

      • Skipped -

      My Perfomance
      • Score

        -

        out of -
      • Rank

        -

        out of -
      Re-Attempt Weekly Quiz Competition
      Self Studies Get latest Exam Updates
      & Study Material Alerts!
      No, Thanks
      Self Studies
      Click on Allow to receive notifications
      Allow Notification
      Self Studies
      Self Studies Self Studies
      To enable notifications follow this 2 steps:
      • First Click on Secure Icon Self Studies
      • Second click on the toggle icon
      Allow Notification
      Get latest Exam Updates & FREE Study Material Alerts!
      Self Studies ×
      Open Now