AIIMS 2018 Chemistry Le Chatelier's Principle MCQ Question

Increasing the temperature of the reaction CaCO₃(s) → CaO(s) + CO₂(g) shifts the equilibrium to the right, favoring the production of gaseous CO₂, which increases the number of moles of gas in the system. According to Le Chatelier's principle, this results in an increase in pressure as the system adjusts to counteract the change.

In contrast, increasing the volume of the container (A) would decrease pressure, while increasing the concentration of CaO (C) does not directly affect the gaseous products. Increasing the concentration of CaCO₃ (D) would shift the equilibrium to produce more CO₂, but the primary factor influencing pressure in this context is temperature.