JEE Main 2013 — Kinetic Theory of Gases Question with Solution
JEE Main 2013 (09 Apr Online)
Question
There are two identical chambers, completely thermally insulated from surroundings. Both chambers have a partition wall dividing the chambers in two compartments. Compartment is filled with an ideal gas and Compartment is filled with a real gas. Compartments and are vacuum. A small hole (orifice) is made in the partition walls and the gases are allowed to expand in vacuum. No change in the temperature of the gas takes place when ideal gas expands in vacuum. However, the temperature of real gas goes down (cooling) when it expands in vacuum. The internal energy of an ideal gas is only kinetic. The internal energy of a real gas is kinetic as well as potential.
Choose an option
Show full solutionCorrect option: A
Correct answer
AStatement-1 is false and Statement-2 is true.
Step-by-step explanation
In ideal gases the molecules are considered as point particles and for point particles, there is no internal excitation, no vibration and no rotation. For an ideal gas the internal energy can only be translational kinetic energy and for real gas both kinetic as well as potential energy.
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This is a previous-year question from JEE Main 2013, covering the Kinetic Theory of Gases chapter of Physics. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.