In the equation \(\left[X+\frac{a}{{Y}^{2}}\right][Y-b]=RT,X\) is pressure, Y is volume, R is universal gas constant and…

In the equation \(\left[X+\frac{a}{{Y}^{2}}\right][Y-b]=RT,X\) is pressure, Y is volume, R is universal gas constant and T is temperature. The physical quantity equivalent to the ratio \(\frac{a}{b}\) is :

[JEE Main 2023, 13 Apr (Shift 2)]