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Kinetic Theory — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsKinetic Theory1 Mark
MCQ
When an ideal gas is compressed adiabatically, its temperature rises the molecules on the average have more kinetic energy than before. The kinetic energy increases,
  • ✓
    Because of collisions with moving parts of the wall only.
  • B
    Because of collisions with the entire wall.
  • C
    Because the molecules gets accelerated in their motion inside the volume.
  • D
    Because of redistribution of energy amongst the molecules.
✓

Answer

Correct option: A.
Because of collisions with moving parts of the wall only.
As the ideal gas compress, then the mean free path becomes smaller so the number of collisions per second between the molecules and walls increases which increase the temperature of gas in turn Kinetic energy of gas molecule increases. Kinetic energy depends on temperature.

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