Class VI

Distilled water contains
  1. poison
  2. bacteria
  3. minerals
  4. only pure water without minerals
One-third of water in human use is
  1. water that is drunk
  2. flushed in the toilets
  3. water used in bath
  4. water used for washing cooking utensils
An artificial lake made by building a dam across river is called a/an
  1. pond
  2. reservoir
  3. lake
  4. stream
Parasite worms spend a part of their life in
  1. human stomach
  2. water snail
  3. human intestines
  4. human blood vessels
A way to obtain fresh water is known as
  1. Chlorination
  2. Filtration
  3. Distillation
  4. Vaporization
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