${CaCO}_{3} (s) ⇌ CaO (s) + {CO}_{2} (g), ΔH = 110 kJ$
The pressure of ${CO}_{2}$

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Decreases if T is raised

Increases if inert gas is passed keeping T constant

Increases if Tis raised

Increases on adding catalyst

answer is C.

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Detailed Solution

Applying Lechatelier's principle.

The equilibrium reaction is CaCO₃(s)⇔CaO(s)+CO₂(g);ΔH=110kJ.

Positive value of the enthalpy change indicates that the reaction is endothermic.

∴ The forward reaction is favored by increasing temperature.

Thus, when the temperature is increased, more carbon dioxide is formed

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