JEE Main 2023PhysicsThermodynamicsMediumMCQ

JEE Main 2023 — Thermodynamics Question with Solution

JEE Main 2023 (01 Feb Shift 2)

Question

For three low density gases A, B, C pressure versus temperature graphs are plotted while keeping them at constant volume, as shown in the figure

The temperature corresponding to the point 'K' is:

Choose an option

Show full solutionCorrect option: A
Correct answer
A-273°C

Step-by-step explanation

In case of constant volume process, i.e., isochoric process, 

From ideal gas equation,

PT=nRV=constant

Or we have, P=nRVt+273

If P=0⇒t=-273°C

Thus, when temperature goes to -273°C, all constituent particles get freezed and pressure goes to zero irrespective of the density of gas.

Hence, the temperature corresponding to the point K=-273°C.

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About this question

This is a previous-year question from JEE Main 2023, 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.