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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper II covers chemistry.

UPSC Combined Geo-Scientist, Prelims · 2024 · Paper II, Chemistry · Q22 of 120

Geo-Scientist Prelims 2024 Chemistry Q22: Consider the following statements regarding Frenkel defect in solids :

QuestionSolid state / point defects

Consider the following statements regarding Frenkel defect in solids :

  1. Statement–1 : Compounds having Frenkel defects have some covalent character.
  2. Statement–2 : Compounds having Frenkel defects have small positive ions and large negative ions, where small positive ions are highly polarizing and large negative ions are readily polarized.

Which one of the following is correct with respect to the above statements?

  1. (a) Both Statement–1 and Statement–2 are true and Statement–2 is the correct explanation of Statement–1
  2. (b) Both Statement–1 and Statement–2 are true and Statement–2 is not the correct explanation of Statement–1
  3. (c) Statement–1 is true but Statement–2 is false
  4. (d) Statement–1 is false but Statement–2 is true

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