For the solution of the gases w, x, y and z in water at 298K, the Henry's law constants (KH) are 0.5, 2, 35 and 40 kbar, respectively. The correct plot for the given data is:

Correct option is C.
Solution:- (C)
From Henry's law, pgas = kH × Xgas
⋍ XH2O + Xgas = 1
⋍ pgas = kH × (1 - XH2O) ⇒ p = kH - kH × XH2O
p = (-kH) × XH2O + kH
From Y = mX + C
slope is -kH and intercept is kH
The intercepts are in the following order for w, x, y and z
w < x < y < z
The most appropriate plot is given by option C.