Chemistry - Chemical Equilibrium Question with Solution | TestHub

$$\begin{array}{c}\text{At}\text{a}\text{fixed}\text{temperature,}\text{the}\text{equilibrium}\text{vapor}\text{pressure}\text{of}\text{pure}\text{water}\text{is}\\ \text{constant.}\text{Moving}\text{the}\text{piston,}\text{removing}\text{vapor,}\text{or}\text{removing}\text{liquid}\text{only}\text{shifts}\text{the}\\ \text{amount}\text{of}\text{water}\text{in}\text{each}\text{phase,}\text{and}\text{the}\text{pressure}\text{returns}\text{to}\text{the}\text{same}\text{value.}\\ \text{Therefore,}\text{options}\text{(a),}\text{(b),}\text{and}\text{(c)}\text{are}\text{incorrect.}\\ \text{Dissolving}\text{a}\text{non-volatile}\text{salt}\text{lowers}\text{the}\text{mole}\text{fraction}\text{of}\text{water,}\text{which}\text{in}\text{turn}\\ \text{decreases}\text{the}\text{vapor}\text{pressure.}\text{Thus,}\text{option}\text{(d)}\text{is}\text{correct.}\\ \text{The}\text{correct}\text{option}\text{is}\text{(d).}\end{array}$$