P-V plots for two gases during adiabatic process are shown in the figure. Plots 1 and 2 should correspond respectively to

In adiabatic process, slope of PV-graph.dpdV=−γPV⇒∣ Slope ∣∝γFrom the given graph ( Slope )2>( Slope )1⇒γ2>γ1Therefore, I should correspond to O2(γ=1.4) and 2 should correspond to He (γ=1.66)