Q. What happens to the equilibrium constant (K) of an exothermic reaction if the temperature is increased?
✅ Correct Answer: (B)
K decreases
Explanation: For an exothermic reaction (heat released as a product), increasing temperature shifts equilibrium toward reactants according to Le Chatelier, so the equilibrium constant K (product/reactant ratio at equilibrium) decreases. Option 1 is the opposite. Option 3 is false because K depends on temperature. Option 4 is impossible in normal chemical systems.
Explanation by: Sikhar Chaudhary
For an exothermic reaction (heat released as a product), increasing temperature shifts equilibrium toward reactants according to Le Chatelier, so the equilibrium constant K (product/reactant ratio at equilibrium) decreases. Option 1 is the opposite. Option 3 is false because K depends on temperature. Option 4 is impossible in normal chemical systems.