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NDA 2 2025 GAT, question 112

Topic: Geography

Q112

Consider the following statements with reference to Feldspar mineral :

  1. Half of the earth’s crust is composed of feldspar

  2. It has light cream to salmon pink colour

  3. Magnesium is a common element in all types of feldspar

Which of the statements given above is/are correct ?

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

Solution.

Answer: (b) 1 and 2 only

  1. Feldspars are extremely abundant crustal minerals and commonly appear pale, cream or pink.
  2. They are aluminium silicates containing potassium, sodium or calcium; magnesium is not a constituent common to all feldspars.
  3. Thus statements 1 and 2 fit the textbook description, while 3 is false.