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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 · Q73 of 120

Geo-Scientist Prelims 2026 Chemistry Q73: The conductivity of a saturated solution of AgCl was found to be…

QuestionElectrochemistry / solubility from conductance

The conductivity of a saturated solution of AgCl was found to be 1·8 × 10⁻⁶ S cm⁻¹ at 25°C after correction for the conductivity of pure water. What is the molar conductivity of Cl⁻ ions at infinite dilution, if the molar conductivity of Ag⁺ ions at infinite dilution is 62·0 S cm² mol⁻¹ and the solubility product of AgCl is 1·69 × 10⁻¹⁰ M² at 25°C ?

  1. (a) 76·5 S cm² mol⁻¹
  2. (b) 200·4 S cm² mol⁻¹
  3. (c) 63·4 S cm² mol⁻¹
  4. (d) 138·4 S cm² mol⁻¹

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