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UPSC Combined Geo-Scientist

Chemist

  • 3 descriptive papers
  • 200 marks each
  • 3 h per paper

Mains Paper II covers physical chemistry.

UPSC Combined Geo-Scientist, Mains · 2017 · Mains Paper II

Q15(b). High proton transport number

Question

Why is the transport number of H⁺ abnormally high relative to Cl⁻ in aqueous HCl?

Answer in brief

Protons conduct by rapid structural transfer through the water hydrogen-bond network as well as ordinary ionic motion.

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The full model answer

As written for the answer booklet: the diagram carries the working, the lines stay short. Read here only; it is not offered as a download.

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Read the whole 2017 solution2017 question paper

CoversHigh proton transport numberElectrolytic conductance

All parts of Question 15