A) Entropy change in a reaction
B) Equilibrium constant of a chemical reaction
C) Dissociation constant of weak acid
D) Shift in equilibrium position on changing value of a constant
Correct Answer: D
Solution :
Key Idea: According to Le-Chateliers principle, If a stress is applied to reaction mixture at equilibrium, reaction occurs in the direction which relieves stress. Stress means change in concentration, pressure, volume or temperature that disturbs the original equilibrium. (i) Entropy change in a reaction is given by second law of thermodynamics. (ii) Dissociation constant of weak acid is given by Ostwald dilution law.
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