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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 · Q13 of 120

Geo-Scientist Prelims 2021 Chemistry Q13: Which one of the following represents the correct order of melting…

Questions-block / Fajans' rule

Which one of the following represents the correct order of melting point among BeCl₂, MgCl₂, CaCl₂ and NaCl?

  1. (a) BeCl₂ < MgCl₂ < CaCl₂ < NaCl
  2. (b) MgCl₂ < BeCl₂ < CaCl₂ < NaCl
  3. (c) BeCl₂ < MgCl₂ < NaCl < CaCl₂
  4. (d) BeCl₂ < CaCl₂ < MgCl₂ < NaCl

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