Chemistry - Chemical Equilibrium Question with Solution | TestHub

$$\begin{array}{c}\text{In}\text{the}\text{system,}{\text{LaCl}}_{\text{3}}\text{(s)}\text{+}{\text{H}}_{\text{2}}\text{O(g)}\text{+}\text{heat}\rightleftharpoons \text{LaOCl(s)}\text{+}\text{2HCl(g),}\text{equilibrium}\text{is}\\ \text{established.}\text{More}\text{water}\text{vapour}\text{is}\text{added}\text{to}\text{disturb}\text{the}\text{equilibrium.}\text{If}\text{the}\\ \text{pressure}\text{of}\text{water}\text{vapour}\text{at}\text{new}\text{equilibrium}\text{is}\text{double}\text{of}\text{that}\text{at}\text{initial}\\ \text{equilibrium,}\text{the}\text{factor}\text{by}\text{which}\text{pressure}\text{of}\text{HCl}\text{is}\text{changed}\text{is}\end{array}$$