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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 · 2021 · Paper II, Chemistry · Q12 of 120

Geo-Scientist Prelims 2021 Chemistry Q12: Consider the following statements regarding Madelung constant:…

QuestionSolid state / lattice energy

Consider the following statements regarding Madelung constant:
Statement-1: Madelung constant typically increases with coordination number
Statement-2: Large contribution towards Madelung constant comes from nearest neighbors, and such neighbors are more numerous when coordination number is large

Which one of the following is correct in respect of 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 but 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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