Paper 1 · People, Development and Environment
Which of the following is not a method of purifying water?
AReverse osmosis
BUV radiation
CDistillation
DEvaporation from a water body ✓ Correct
Correct answer: (D) Evaporation from a water body — Evaporation from a water body is not a method of purifying water, so that is the answer.
Explanation
★Evaporation from a water body is not a method of purifying water, so that is the answer.
★Reverse osmosis, UV radiation and distillation are all deliberate purification methods.
★Reverse osmosis filters out impurities and distillation boils and recondenses water.
★UV radiation kills germs to disinfect water.
★Plain evaporation from a water body is a natural process that does not collect purified water.
★So the one that is not a purification method is evaporation from a water body.
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