Chemistry - Chemical Equilibrium Question with Solution | TestHub

NH₄HS(s) ⇌ NH₃(g) + H₂S(g) At equilibrium P_NH3 + P_H2S = 600 mm, so P_NH3 = 600 - 480 = 120 mm

The solid gives equal pressures of both gases, so the H₂S added at the start is 480 - 120 = 360 mm

P = 360 mm

This is option (c).