Class VI

The process of solid changing directly in vapour form without becoming liquid is called
  1. sedimentation
  2. sublimation
  3. evaporation
  4. condensation
The process of settling down of particles of a solid in a liquid is known as
  1. sublimation
  2. sedimentation
  3. decantation
  4. precipitation
Which of the following is essential to perform winnowing activity?
  1. soil
  2. water
  3. wind
  4. none of these
The solubility of water __________ with an increase in water.
  1. increases
  2. decreases
  3. remains same
  4. sometimes increases and sometimes decreases
Salt is obtained from sea water by using which of the following process
  1. Sedimentation
  2. Condensation
  3. Evaporation
  4. Centrifugation
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