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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 · Q71 of 120

Geo-Scientist Prelims 2026 Chemistry Q71: The m^∞ values for calcium acetate, sodium acetate and sodium…

QuestionElectrochemistry / Kohlrausch's law

The \(\Lambda_m^\infty\) values for calcium acetate, sodium acetate and sodium iodide solutions are 202, 91 and 127 S cm² mol⁻¹ respectively at 298 K. The \(\Lambda_m^\infty\) for calcium iodide is

  1. (a) 238 S cm²mol⁻¹
  2. (b) 274 S cm²mol⁻¹
  3. (c) 365 S cm²mol⁻¹
  4. (d) 456 S cm²mol⁻¹

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