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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 · 2025 · Paper II, Chemistry · Q20 of 120

Geo-Scientist Prelims 2025 Chemistry Q20: The cations A⁺ will form the most ionic halide and A³⁺ the most…

QuestionChemical bonding / Fajans' rules

The cations A⁺ will form the most ionic halide and A³⁺ the most covalent halide with :

  1. (a) I⁻ and F⁻ respectively
  2. (b) F⁻ and I⁻ respectively
  3. (c) F⁻ and F⁻ respectively
  4. (d) I⁻ and I⁻ respectively

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