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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 · 2017 · Mains Paper III

Q4(c). Redox and acid–base indicators

Question

Explain the functions of (i) diphenylamine sulfonic acid and (ii) methyl yellow as indicators.

Answer in brief

Diphenylamine sulfonic acid is a redox indicator; methyl yellow is an acid–base indicator.

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CoversRedoxacid–base indicatorsTitration indicators

All parts of Question 4