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Question

The equilibrium constant of a reaction:


A
has only numerical value and carries no units
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B
can be with or without units depending upon the stoichiometric coefficients of the species involved in a chemical equation
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C
always depends upon the units in which the concentrations of species involved in chemical reaction
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D
changes if the concentrations of all the species involved in the chemical reaction are doubled
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Solution

The correct option is B can be with or without units depending upon the stoichiometric coefficients of the species involved in a chemical equation
When the sum of the stoichiometric coefficients of reactants is equal to the sum of the stoichiometric coefficients of the products, the equilibrium constant has no units and vice versa. This excludes solids and pure liquids which do not appear in the expression for the equilibrium constant.

Hence, equilibrium constants of a reaction can be with or without units depending upon the stoichiometric coefficients of the species involved in a chemical equation.

Chemistry

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