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Question

The harmful and unwanted substances which degrade the quality of water are called as ________.
  1. water pollutants
  2. soil pollutants
  3. air pollutants
  4. none of the above

A
water pollutants
B
soil pollutants
C
air pollutants
D
none of the above
Solution
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Any external substance which changes the natural qualities of water is known as a water pollutant. These can be chemical or biological. These pollutants harm the natural quality of water causing water pollution.
So, the correct option is A

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(c) While ___ your teeth, leaving the ___ running may waste several ___ of water. (tap, litres, brushing, washing, drops)
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(e) Water which looks clean still has disease carrying ___and ___ impurities. (insects, microorganism, particles, dissolved, harmful).


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