According to Henry’s law, the partial pressure of gas $\left({\mathrm{P}}_{\mathrm{g}}\right)$ is directly proportional to mole fraction of gas in liquid solution,${\mathrm{P}}_{\mathrm{gas}}={\mathrm{K}}_{\mathrm{H}}.{\mathrm{X}}_{\mathrm{gas}}$, where   K_H is henry’s constant. Which is incorrect?

K_H  is characteristic constant for a given gas-solvent system. 

Higher is the value of K_H, lower is solubility of gas for a given partial pressure of gas 

K_H has temperature dependence

K_H decreases with increases of temperature