21 JEE Main 2026 Thermodynamics previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2026 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.
An insulated cylinder of volume 60 ~cm³ is filled with a gas at 27ⁱrc C and 2 atmospheric pressure. Then the gas is com…
A certain gas is isothermally compressed to ((1)/(3) )rd of its initial volume (Vo = 3 litre) by applying required pres…
10 mole of an ideal gas is undergoing the process shown in the figure. The heat involved in the process from P₁ to P₂ i…
One mole of an ideal diatomic gas expands from volume V to 2 V isothermally at a temperature 27ⁱrc C and does W joule o…
One mole of diatomic gas having rotational modes only is kept in a cylinder with a piston system. The cross-section are…
Consider the following statements: A. Zeroth law of thermodynamics gives concept of temperature B. First law of thermod…
10 mole of oxygen is heated at constant volume from 30ⁱrc C to 40ⁱrc C. The change in the internal energy of the gas is…
Heat is supplied to a diatomic gas at constant pressure. Then the ratio of Δ Q : Δ U : Δ W is _______.
A diatomic gas (γ=1.4) does 100 J of work when it is expanded isobarically. Then the heat given to the gas \\\\_ J.
5 moles of unknown gas is heated at constant volume from 10 °C to 20 °C. The molar specific heat of this gas at constan…
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