In which of the following cases the reaction is farthest from completion?

Explanation

The value of the equilibrium constant (K) does not determine how far a reaction is from completion. The equilibrium constant represents the ratio of product concentrations to reactant concentrations at equilibrium for a given reaction. It indicates the extent to which a reaction reaches equilibrium, but it does not directly indicate how far the reaction is from completion. The position of equilibrium, which determines the extent of completion, is influenced by factors such as the relative concentrations of reactants and products, temperature, and pressure (for gaseous reactions). The lower the Kc value, the farthest will be the reaction from completion. In this case, the reaction will not go to completion.