CaCO3(s)  CaO(s) + CO2(g) For the above equilibrium, which is correct? (A) Equilibrium will — AITS & Test Series Chemistry Question

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CaCO3(s)  CaO(s) + CO2(g) For the above equilibrium, which is correct? (A) Equilibrium will shift in forward direction by addition He at constant volume (B) Equilibrium will shift in forward direction by addition of He at constant pressure (C) Equilibrium with shift in backward direction by addition of He at constant volume (D) Equilibrium will shift in backward by addition of He at constant pressure