Question

Which statement about Kc is wrong?
A. Kc is always a constant
B. For some reactions, Kc increases with temperature increase
C. For some reactions, Kc decreases with temperature decrease
D. For some reactions, Kc changes when pressure is changed




A is incorrect. Kc stays constant for concentration and pressure changes but not for temperature changes.

B and C are correct.

D is incorrect. It is true that a system at equilibrium may be made to shift one way or another (for some reactions) by changing the pressure, BUT, Kc will not change.

I note that the question asks which <b>statement</b> (not statements) are wrong.