27 JEE Main 2025 Thermodynamics previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2025 previous-year questions from the Thermodynamics chapter of Physics. Each links to a full solution with a verified answer key. To see the whole chapter across all years, visit the Thermodynamics chapter hub.
A container of fixed volume contains a gas at 27ⁱrc C . To double the pressure of the gas, the temperature of gas shoul…
Pressure of an ideal gas, contained in a closed vessel, is increased by 0.4 \% when heated by 1ⁱrc C. Its initial tempe…
Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A)…
There are two vessels filled with an ideal gas where volume of one is double the volume of other. The large vessel cont…
Water of mass m gram is slowly heated to increase the temperature from T₁ to Tz The change in entropy of the water, giv…
Given are statements for certain thermodynamic variables, (A) Internal energy, volume (V) and mass (M) are extensive va…
For a diatomic gas, if γ₁= ((C p)/(C v) ) for rigid molecules and γ₂= ((C p)/(C v) ) for another diatomic molecules, bu…
The magnitude of heat exchanged by a system for the given cyclic process ABCA (as shown in figure) is (in SI unit) :
An ideal gas initially at 0ⁱrc C temperature, is compressed suddenly to one fourth of its volume. If the ratio of speci…
A gas is kept in a container having walls which are thermally non-conducting. Initially the gas has a volume of 800 ~cm…
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