An ideal gas undergoes for different processes from the same initial state (figure). Four processes are adiabatic, isothermal, isobaric and isochoric. Out of 1, 2, 3 and 4 which one is adiabatic ?

Options

A. 4
B. 3
C. 2
D. 1

Answer

C

Explanation

1 is isochoric (constant volume) 4 is isobaric (constant pressure). Out of curves 2 and 3 since curve 2 is steeper than curve 3, it represents an adiabatic change whereeas curve 3 represent an isothermal change.