The stopcock between A and B is opened and the system is allowed to come to equilibrium. The pressur — States of Matter and Gaseous State Chemistry Question

💡 Solution & Explanation

At -73°C, H₂O is solid. CO₂ (sublimes at -78°C) and N₂ remain gaseous. The gases distribute between A and B, but the solid H₂O condenses entirely in the colder bulb B. Thus A has CO₂/N₂ gases, B has CO₂/N₂ gases and solid H₂O. Therefore, correct answer is C.