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Environment issue Test - 7

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Environment issue Test - 7
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Weekly Quiz Competition
  • Question 1
    1 / -0

    What does high intake of fluoride mainly affect?

    Solution

    If the amount of fluoride taken increases, it harms teeth by causing dental fluorosis in which development of enamel is disturbed.

  • Question 2
    1 / -0

    Which of these pollutants are responsible for photochemical smog formed in congested metropolitan cities?

    Solution

    Photochemical smog is a type of smog produced when ultraviolet light from the sun reacts with nitrogen oxides in the atmosphere. It is visible as a brown haze, and is most prominent during the morning and afternoon, especially in densely populated, warm cities.Ozone peroxyacetyl nitrate and oxides of nitrogen are responsible for its formation.

  • Question 3
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    Which of the following is the correct match of environment-related disorder and its cause?

    Solution

    The Maximum Contaminant Level (MCL) of nitrate as nitrogen (NO3N) is 10 mg/L (or 10 parts per million) for the safety of drinking water. Nitrate levels at or above this level have been known to cause a potentially fatal blood disorder in infants under six months of age called methemoglobinemia or 'blue baby syndrome'; in which there is a reduction in the oxygen-carrying capacity of blood.

  • Question 4
    1 / -0

    The recent reports of acid rain in big industrial cities are due to the effect of atmospheric pollution by

    Solution

    Acid rain is, in fact, the cocktail of H2SO4 and HNO3. The SO2 and NO2 produced during the combustion of coal and petroleum react with water vapours and form H2SO4 and HNO3, respectively.

    2SO2 + O2  → 2SO3

    SO3 + H2O  → H2SO4

    2NO + [O]  → N2O5
    N2O5 + H2O  → 2HNO3

  • Question 5
    1 / -0

    Formation of non-functional methaemoglobin causes blue-baby syndrome. This occurs due to

    Solution

    The environmental Protection Agency (EPA) has set the Maximum Contamination Level (MCL) of nitrates for the safety of drinking water. Nitrate levels at or above this level have been known to cause a potentially fatal blood disorder in infants under six months of age called methaemoglobinemia or blue-baby syndrome, in which there is a reduction in the oxygen carrying capacity of blood.

  • Question 6
    1 / -0

    In the following question, two statements are given, namely Assertion (A) and Reason (R). Read both these statements and choose the correct option regarding them.
    Assertion (A): Nitrogen fixation is achieved industrially by the Haber Bosch process in which H2 and N2 are mixed together at high temperature and pressure in the presence of a catalyst to form NH3.
    Reason (R): Fertilisers like ammonium nitrites are prepared by this process.

    Solution

    Nitrogen fixation is achieved industrially by the Haber Bosch process in which H2 and N2 are mixed together at high temperature and pressure in the presence of a catalyst to form NH3.Fertilisers like ammonium nitrites are prepared by this process.

  • Question 7
    1 / -0

    Which of the following are the immediate concerns regarding carbon cycle?

    a. Output rate of carbon locked in deposits of coal, petroleum and natural gas
    b. Green house effect caused by CO2
    c. Increase in CO2 on Earth's atmosphere by 12 to 14%
    d. Increase in CO2 decreasing primary productivity
    e. Increase in photorespiration

    Solution

    Output rate of carbon locked in deposits of coal, petroleum, and natural gas, green house effect and increase in CO2 on earth's atmosphere by 12 to 14 % are the immediate concerns regarding carbon cycle.

  • Question 8
    1 / -0

    Which of the following chemicals was responsible for 'itai itai' disease in Japan?

    Solution

    This is the correct option. Cadmium was responsible for 'itai itai' disease in Japan. This disease was caused due to the eating of rice produced from soil containing high level of cadmium.

  • Question 9
    1 / -0

    Which of the following gets reduced as a result of 'eutrophication'?

    Solution

    Eutrophication is the process by which dissolved oxygen in water gets reduced due to excessive growth of algae as a result of extra loading of nutrients in the water body.

  • Question 10
    1 / -0

    Due to greenhouse effect, the average temperature of Earth's atmosphere is gradually increasing. This is called global warming. Which of the following are not greenhouse gases?

    Solution

    A greenhouse gas is a gas that absorbs and emits radiant energy within the thermal infrared range. Greenhouse gases cause the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide and ozone.
    Oxygen and Nitrogen are not greenhouse gases

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