Question

Which of the following statements about the reaction quotient, Q, are correct?

• A. Q = 1 at equilibrium
• B. Q (numerical value) varies as reaction proceeds
• C. The reaction quotient, Q, and the equilibrium constant always have the same numerical value
• D. Q may be > or < or $=K_{eq}$

Answer 1

Answer: (B), (D)

Option A is incorrect because the value of the reaction quotient and the equilibrium constant is same only when the reaction is at equilibrium. Option B is correct because depending on the progress of reaction, the value of the reaction quotient may be either less than, equal to or greater than the value of equilibrium constant. Option C is correct because as the reaction progresses, the concentrations of products and reactants changes. Hence, the value of the reaction quotient changes. Option D is incorrect because at the equilibrium, the value of the reaction quotient is equal to the value of the equilibrium constant which may or may not be equal to 1.