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NDA 1 2024 GAT, question 71

Topic: Geography

Q71

Which of the following statements regarding Barchan is/are correct ?

  1. It is a crescent shaped mound of sand, which is deposited by the wind blowing constantly from one direction in a desert.

  2. The windward side has a convex steep slope with maximum height at the centre.

  3. Two ends of Barchan are called horns and point opposite to the direction the wind blows.

Select the answer using the code given below :

  1. (a) 1 onlyCorrect answer
  2. (b) 1 and 2 only
  3. (c) 2 and 3 only
  4. (d) 1, 2 and 3

Solution.

Answer: (a) 1 only

  1. A barchan is a crescent-shaped dune formed by a prevailing wind, so statement 1 is correct.
  2. Its windward slope is relatively gentle and its slip face is steep, contradicting statement 2.
  3. Its horns point downwind, not opposite the wind’s travel, contradicting statement 3.