Answer: Option (B) is the correct answer.
Explanation:
Q is defined as the reaction quotient which is equal to the concentration of products divided by the concentration of reactants.
Q can be measured at any condition of the reaction.
Whereas[tex]K_{eq}[/tex] is the equilibrium constant and it is also equal to the concentration of products divided by the concentration of reactants. Also, [tex]K_{eq}[/tex] is measured at equilibrium condition.
But at equilibrium, Q = [tex]K_{eq}[/tex]
Also, there is no relation between Q and temperature.
Thus, we can conclude that the statement Q is the same as Keq when a reaction is at equilibrium, is true.
