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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 · 2026 · Paper II, Chemistry · Q76 of 120

Geo-Scientist Prelims 2026 Chemistry Q76: What molality of NaCl is needed so that it has the same ionic…

QuestionElectrochemistry / ionic strength

What molality of NaCl is needed so that it has the same ionic strength as 0·100 m Ca₃(PO₄)₂ ?

  1. (a) 0·300 m
  2. (b) 0·500 m
  3. (c) 1·00 m
  4. (d) 1·500 m

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