NTA Abhyas JEE Main2020PhysicsThermodynamicsPractice
P - V plots for two gases during adiabatic processes are shown in the figure. Plots 1 and 2 should correspond respectively to
Options
- AHe and O 2
- BO 2 and He
- CHe and Ar
- DO 2 and N 2
Correct answer
B. O 2 and He
Step-by-step solution
In adiabatic process, slope of P - V graph is given as, d P d v = - γ P V . For a given P - V graph, slope ∝ - γ From the given graph, slope 2 > slope 1 ∴ γ 2 > γ 1 Therefore, plot 1 should correspond to O 2 γ = 1. 4 and plot 2 should correspond to He γ = 1. 6 7 .