Class IX

Process in which vapor molecules are recaptured by molecules at liquid surface is called
  1. evaporation
  2. sublimation
  3. condensation
  4. boiling
In pressure cooker pressure applied is
  1. 1 atm
  2. 2 atm
  3. 3 atm
  4. 4 atm
Pressure that vapors apply on surface of liquid at equilibrium is called
  1. vapor pressure
  2. liquid pressure
  3. liquid pressure
  4. condensation
At constant pressure average kinetic energy of gas molecules increases 2 times if
  1. temperature is increased by 2 times
  2. temperature is halved
  3. no change in temperature
  4. none of above
Barometer is invented by
  1. Galileo
  2. Robert Boyle
  3. Charles
  4. Torricelli
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