VKC ScienceChemistry for written exams Telegram

UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper I covers general studies.

UPSC Combined Geo-Scientist, Prelims · 2020 · Paper I, General Studies · Q88 of 120

Geo-Scientist Prelims 2020 General Studies Q88: The dye in black ink can be separated by the method of:

QuestionChemistry / separation

The dye in black ink can be separated by the method of:

  1. (a) evaporation
  2. (b) fractional distillation
  3. (c) dialysis
  4. (d) chromatography

Answer: (d) chromatography

Dyes in ink are separated by chromatography: components move at different speeds on paper/column due to different adsorption and solubility. Evaporation leaves all dyes together.

Take this paper offlineAll 120 questions with answers and explanations in one PDF.
Download PDFJoin Telegram