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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 · Q78 of 120

Geo-Scientist Prelims 2021 Chemistry Q78: Consider the following plot for conductometric study of a reaction…

QuestionElectrochemistry / precipitation titration

Consider the following plot for conductometric study of a reaction between KCl and AgNO₃ solutions:

UPSC Combined Geo-Scientist Prelims 2021 Paper II (Chemistry), Q78: figure printed with the question

Cause/s behind the constancy of conductance in the region PQ is/are due to:

  1. (a) Precipitation of AgCl only
  2. (b) Replacement of Cl⁻ by NO₃⁻ with each species having equal conductance
  3. (c) Precipitation of AgCl and replacement of Cl⁻ by NO₃⁻
  4. (d) Inert behavior of the instrument in this region

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