Class X

Out of total amount of water available for human use is
  1. 0.30%
  2. 0.2%
  3. 40%
  4. 50%
Natural water is
  1. pure
  2. impure
  3. acts as solute
  4. distilled
Ratio of hydrogen (H) and oxygen (O) in water molecule by volume is
  1. 2: 1
  2. 1: 2
  3. 3: 1
  4. 4: 1
Density of water becomes maximum at
  1. 10°C
  2. 4°C
  3. 5°C
  4. 12°C
Water which forms scum with soap is called
  1. hard water
  2. soft water
  3. distilled water
  4. un distilled water
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