15 June (Environment)

1. 1. Question

   Consider the following statements regarding Desertification.

   1. Desertification refers to the expansion of existing deserts.
   2. Desertification is caused primarily by human activities alone.
   3. United Nations Convention to Combat Desertification is the only internationally legally binding framework set up to address the problem of desertification.

   Which of the above statements is/are incorrect?

   •  a) 2 only
   •  b) 1, 2
   •  c) 3 only
   •  d) 1, 2, 3

2. 2. Question

   Consider the following statements regarding Desertification.

   1. India has witnessed increase in the level of desertification in more than half of the states between 2003-05 and 2011-13.
   2. Jaisalmer in Rajasthan has witnessed highest area under desertification during 2011-13.

   Which of the above statements is/are correct?

   •  a) 1 only
   •  b) 2 only
   •  c) Both
   •  d) None

3. 3. Question

   Arrange the following reasons that cause desertification in India in the ascending order.

   1. Wind erosion
   2. Water erosion
   3. Vegetation degradation
   4. Salinity

   Select the correct code:

   •  a) 3 – 2 – 4 – 1
   •  b) 2 – 3 – 4 – 1
   •  c) 4 – 1 - 3 – 2
   •  d) 2 – 3 – 1 – 4

4. 4. Question

   Consider the following statements regarding Eutrophication.

   1. Eutrophication is when a body of water becomes overly enriched with minerals and nutrients which induce excessive growth of algae and in turn, increases water quality.
   2. Increase of phytoplankton in a water body is the response to increased levels of nutrients.

   Which of the above statements is/are correct?

   •  a) 1 only
   •  b) 2 only
   •  c) Both
   •  d) None

5. 5. Question

   Which of the following microorganisms is/are used as Bio-fertilizers?

   1. Rhizobium
   2. Azospirillum
   3. Azotobacter
   4. mycorrhiza

   Select the correct code:

   •  a) 1, 2, 3
   •  b) 2, 3, 4
   •  c) 1, 3, 4
   •  d) 1, 2, 3, 4