Paper 1 · People, Development and Environment
UGC NET December 2021 June 2022 (01.10.2022) Shift-II
Dissolved oxygen (DO) is important for
ADrinking water
BRain water
CUnderground water
DRiver water ✓ Correct
Correct answer: (D) River water — The answer is river water.
Explanation
★The answer is river water.
★Dissolved oxygen is the oxygen present in water.
★Aquatic plants and animals in flowing water depend on it to survive.
★So dissolved oxygen is especially important for river water and other surface water bodies.
★It supports the aquatic life there.
★Drinking, rain and underground water are not judged mainly by their dissolved oxygen.
★So the answer is river water.
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