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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 · Q117 of 120

Geo-Scientist Prelims 2026 General Studies Q117: The temperature about which a hot solid object emits infrared…

QuestionPhysics / Thermal radiation

The temperature about which a hot solid object emits infrared radiation alone is

  1. (a) up to 100 °C
  2. (b) up to 500 °C
  3. (c) up to 1500 °C
  4. (d) above 1500 °C

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