1. Which gas is responsible for the maximum contribution to global warming?

  • Option : C
  • Explanation : Maximum contributor to global warming gas is Carbon dioxide (C0 2) followed by methane, nitrous oxide and chlorofluorocarbon.

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2. Major consequences of deforestation are
1. Destruction of the natural habitat of wild animals.
II. Impact on the water cycle.
III. Soil erosion.
Which of the statement(s) given above is/are correct?

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3. Which part of atmosphere blocks ultraviolet rays oflight to reach Earth's surface?

  • Option : A
  • Explanation : The ozone layer present in the Earth's stratosphere absorbs and blocks the harmful ultraviolet rays from reaching the Earth's surface.

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4. Deforestation will decrease

  • Option : A
  • Explanation : Deforestation directly affects the rainfall pattern. Due to deforestation, the forest fails to replenishe the clouds to bring rain. In other word, deforestation has great impact on the water cycle which plays a great role to bring rain to maintain the forest and the ecosystem.

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5. Minamata disease is a pollution relate, disease which results from

  • Option : C
  • Explanation : Minamata disease is a neurological syndrome caused by sever mercury poisonmg. Consumption of contaminated water with mercury contains can lead to this form of disease. It is not an infectious disease, transferred by air or food neither is it genetically inherited.

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