On increasing temperature, the equilibrium constant of exothermic and endothermic reactions, respectively

Options

A. increases and decreases
B. decreases and increases
C. increases and increases
D. decreases and decreases

Answer

B

Explanation

For `A+Boverset(k_f)underset(k_b)(hArr)C+D,K=(k_f)/(k_b)`
For exothermic reaction, `k_(f)` decreases with increase of temperature so that K decreases. For endothermic reaction, `k_(f)` increases with increase of temperature so that K increase.