Class IX

How can we separate cream from milk ?
  1. Centrifugation
  2. Chromatography
  3. Sublimation
  4. Distillation
Which of the following is a chemical change ?
  1. Melting of ice
  2. Rusting of iron
  3. Dissolving salt in water
  4. Boiling of water into steam
A mixture of water and silver chloride can be separated by
  1. Centrifugation
  2. Sedimentation
  3. Filtration
  4. Sublimation
When two liquids in a mixture differ by their boiling points, which of the following is the best method to separate these liquids ?
  1. Evaporation
  2. Distillation
  3. Chromatography(
  4. Filtration
Anemometer measures
  1. Amount of haemoglobin in blood
  2. Pollination of plant by the wind
  3. Wind resistance
  4. Wind speed.
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