JEE Advanced 2020 Full Test 2 Paper 1

In the system, LaCl3(s)+H2O(g)+ heat ⇌LaClO(s)+2HCl(g), equilibrium is established. More water vapour is added to disturb the equilibrium. If the pressure of water vapour at new equilibrium is double of that at initial equilibrium, the factory by which pressure of HCl is changed is: