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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 · 2020 · Paper I, General Studies · Q30 of 120

Geo-Scientist Prelims 2020 General Studies Q30: Which one of the following is the common term to describe the main…

QuestionGeography / water

Which one of the following is the common term to describe the main source of water for human withdrawals?

  1. (a) Green water
  2. (b) Hard water
  3. (c) Blue water
  4. (d) Storm water

Answer: (c) Blue water

Blue water = fresh surface and groundwater (rivers, lakes, aquifers) — the source of human withdrawals for irrigation, industry and homes. Green water = soil moisture used by plants; grey water = used/polluted water.

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