Which of the following is a wrong statement about equilibrium state ?

Options

A. Rate of forward reaction = Rate of backward reaction
B. Equilibrium is dynamic
C. Catalysts increase value of equilibrium constant
D. Free energy change is zero

Explanation

To determine which statement about equilibrium state is wrong, let's analyze the options step by step.

### Step 1: Understanding Dynamic Equilibrium
- **Statement**: Equilibrium is dynamic.
- **Explanation**: In a dynamic equilibrium, the forward and reverse reactions occur at the same rate. This means that while the concentrations of reactants and products remain constant, the reactions are still occurring. Therefore, this statement is correct.

### Step 2: Analyzing the Role of Catalysts
- **Statement**: A catalyst increases the value of the equilibrium constant.
- **Explanation**: A catalyst speeds up the rate at which equilibrium is reached but does not affect the position of equilibrium or the equilibrium constant itself. The equilibrium constant is determined by the concentrations of reactants and products at equilibrium, and a catalyst does not change these concentrations. Thus, this statement is incorrect.

### Step 3: Free Energy Change at Equilibrium
- **Statement**: Free energy change is 0 at equilibrium.
- **Explanation**: At equilibrium, the system has reached a state where there is no net change in the concentrations of reactants and products, and therefore, the change in Gibbs free energy (ΔG) is indeed 0. This statement is correct.

### Conclusion
- The wrong statement about equilibrium state is: **A catalyst increases the value of the equilibrium constant**.