JEE Main 2026 — Thermodynamics Question with Solution
JEE Main 2026 (08 April Shift 2)
Question
Initial pressure and volume of a monoatomic ideal gas are and . The change in internal energy of this gas in adiabatic expansion to volume is ________ J.
Choose an option
Show full solutionCorrect option: C
Correct answer
C
Step-by-step explanation
For a monoatomic ideal gas, the ratio of specific heats is .
In an adiabatic process, .
The change in internal energy is given by:
Substituting the values:
Answer:
In an adiabatic process, .
The change in internal energy is given by:
Substituting the values:
Answer:
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This is a previous-year question from JEE Main 2026, covering the Thermodynamics 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.