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UPSC Combined Geo-Scientist

Chemist

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

Prelims Paper II covers chemistry.

UPSC Combined Geo-Scientist, Prelims · 2021 · Paper II, Chemistry · Q6 of 120

Geo-Scientist Prelims 2021 Chemistry Q6: Argon (Ar) is used in arc welding because of its:

QuestionNoble gases / uses

Argon (Ar) is used in arc welding because of its:

  1. (a) High calorific value
  2. (b) Ability to lower the melting point of metal
  3. (c) Low reactivity
  4. (d) Flammability

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