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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 · 2026 · Paper I, General Studies · Q71 of 120

Geo-Scientist Prelims 2026 General Studies Q71: Which one of the following components is added to optical glass to…

QuestionChemistry / Glass

Which one of the following components is added to optical glass to cut off UV rays?

  1. (a) Copper oxide
  2. (b) Cerium oxide
  3. (c) Manganese oxide
  4. (d) Cobalt oxide

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