Question

Which is incorrect about Henry's law

Answer 1

Henry's law states that at a constant temperature, the solubility of a gas is directly proportional to the pressure of a gas.
In other words, The partial pressure of the gas in vapour phase (p) is proportional to the mole fraction of the gas (X) in the solution.
$p=K_H\times X$
$K_H$ is the Henry's law constant.
(a) At constant temperature, different gases have different $K_H$ values. Thus, $K_H$ is a function of nature of gases.
Thus, correct.
(b) p (partial pressure) = $K_H\times \chi$
If p is constant and $K_H$ value increases then $\chi$ (solubility) decreases. Thus, correct.
(c) $K_H$ increases with increase in temperature thus, correct.
(d) $K_H$ is independent of pressure thus, incorrect.