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UPSC Combined Geo-Scientist

Chemist

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

Mains Paper I covers inorganic chemistry.

UPSC Combined Geo-Scientist, Mains · 2020 · Mains Paper I

Q9(a). Metallochromic indicators and their colour change

Question

Define metallochromic indicators. Explain the mechanism of colour change in the complexometric titration with a suitable example.

Model answer

The free solution for 2020 answers questions 1, 3, 4, 7, 8 and 10, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.

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Coversmetallochromic indicatorsEriochrome Black TEDTA titrationmetal-indicator complex

All parts of Question 9