Which of the following statements regarding a chemical equilibrium is wrong

Options

A. An equilibrium can be shifted by altering the temperature or pressure
B. An equilibrium is dynamic
C. The same state of equilibrium is reached whether one starts with the reactants or the products
D. The forward reaction is favoured by the addition of a catalyst

Explanation

To determine which statement regarding chemical equilibrium is wrong, let's analyze each statement step by step.

### Step 1: Analyze the first statement
**Statement:** An equilibrium can be shifted by altering the temperature or pressure.

**Analysis:** This statement is true. According to Le Chatelier's Principle, if a system at equilibrium is subjected to a change in temperature, pressure, or concentration, the equilibrium will shift in a direction that counteracts the change.

### Step 2: Analyze the second statement
**Statement:** Equilibrium is dynamic.

**Analysis:** This statement is also true. Chemical equilibrium is dynamic because the forward and reverse reactions continue to occur, but at equal rates. This means that the concentrations of reactants and products remain constant over time.

### Step 3: Analyze the third statement
**Statement:** The same state of equilibrium is reached whether one starts with a reactant or the product.

**Analysis:** This statement is true as well. The equilibrium constant (K) remains the same regardless of whether the reaction starts with reactants or products. The system will adjust to reach the same equilibrium position.

### Step 4: Analyze the fourth statement
**Statement:** The forward reaction is favored by the addition of catalysts.

**Analysis:** This statement is incorrect. Catalysts do not favor the forward reaction over the backward reaction; they increase the rate of both the forward and reverse reactions equally. Therefore, while a catalyst speeds up the attainment of equilibrium, it does not change the position of the equilibrium.

### Conclusion
The statement that is wrong regarding chemical equilibrium is: **"The forward reaction is favored by the addition of catalysts."**

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