Class IX

Materials existing as liquids have -
  1. Boiling point and melting point above room temperature
  2. Boiling point and melting point below room temperature
  3. Boiling point above room temperature and melting point below room temperature
  4. Boiling point and melting point below room temperature
Gases do not have -
  1. High compressibility
  2. High fluidity
  3. High density
  4. Large volume
 Evaporation of a liquid can take place:
  1. At its boiling point
  2. At all temperatures
  3. At its freezing point
  4. At a fixed temperature
Grahams law refers to:
  1. Boiling point of water
  2. Gaseous diffusion
  3. Gas compression
  4. Volume changes of gases
  We get the smell of hot food in the kitchen outside the house because of:
  1. Boiling
  2. Evaporation
  3. Sublimation
  4. Diffusion
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