Study the graph between partial pressure and mole fraction of some gases and arrange the gases P, Q, R and S dissolved in H₂ O, in the decreasing order of their K H values.

Step-by-step solution

According to Henry's Law, the partial pressure p of a gas is related to its mole fraction x in the solution by the equation p = K_H x , where K_H is the Henry's Law constant. The given graph plots partial pressure on the y-axis and mole fraction x on the x-axis. The slope of each line represents the Henry's Law constant K_H for the respective gas. Comparing the slopes of the lines for gases P, Q, R, and S, we observe that the line for S has the steepest slope, followed by P, then R, and finally Q, which has the sma