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NEET 2022, Physics Q18: Thermodynamic Processes

NEET2022Physics
Q.

An ideal gas undergoes four different processes from the same initial state as shown in the figure below. Those processes are adiabatic, isothermal, isobaric and isochoric. The curve which represents the adiabatic process among 1,2,3 and 4 is :

  1. A

    2

  2. B

    3

  3. C

    4

  4. D

    1

Solution

Identify each curve by the constant quantity it represents.

Curve 1 is vertical (constant volume), so it is the isochoric process.

Curve 4 is horizontal (constant pressure), so it is the isobaric process.

Of the two falling curves, the adiabatic ( const) is steeper than the isothermal ( const) because . So curve 2 is adiabatic and curve 3 is isothermal.

Concept behind this question

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