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UPSC Combined Geo-Scientist

Chemist

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

Mains Paper III covers analytical and organic chemistry.

UPSC Combined Geo-Scientist, Mains · 2019 · Mains Paper III

Q3(b). Isoelectric and isoionic points

Question

Distinguish isoelectric and isoionic points using alanine.

Answer in brief

The isoelectric point is the pH of zero mean molecular charge; the isoionic point is the pH of a solution of the pure ampholyte in water without added counterions.

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The full model answer

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Read the whole 2019 solution2019 question paper

CoversIsoelectricisoionic pointsAmino-acid equilibria

All parts of Question 3