32 JEE Main 2021 Thermodynamics previous-year questions with verified answers and step-by-step solutions.
These are the JEE Main 2021 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.
The width of one of the two slits in a Young's double slit experiment is three times the other slit. If the amplitude o…
If one mole of an ideal gas at P 1 , V 1 is allowed to expand reversibly and isothermally ( A to B ) its pressure is re…
A reversible heat engine converts one-fourth of the heat input into work. When the temperature of the sink is reduced b…
A monoatomic ideal gas, initially at temperature T 1 is enclosed in a cylinder fitted with a frictionless piston. The g…
The entropy of any system is given by, S = α 2 β ln μ kR J β 2 + 3 where α and β are the…
In the reported figure, heat energy absorbed by a system in going through a cyclic process is ______ π J .
In the reported figure, there is a cyclic process A B C D A on a sample of 1 mol of a diatomic gas. The temperature of…
An ideal gas in a cylinder is separated by a piston in such a way that the entropy of one part is S 1 and that of the o…
Match List I with List II . List I List II (a) Isothermal (i) Pressure constant (b) Isochoric (ii) Temperature constant…
A Carnot's engine working between 400   K and 800   K has a work output of 1200   J per cycle. The amoun…
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