The state of equilibrium refers to

Options

A. State of rest
B. Dynamic state
C. Stationary state
D. State of inertness

Explanation

To solve the question regarding the state of equilibrium, we can break it down step by step:

### Step-by-Step Solution:

1. **Understanding Equilibrium**:
- Equilibrium in a chemical reaction occurs when the rates of the forward and reverse reactions are equal. This means that the concentration of reactants and products remains constant over time.

2. **Identifying the Nature of Equilibrium**:
- At equilibrium, it may appear that the reaction has stopped because the concentrations of reactants and products do not change. However, this is misleading.

3. **Dynamic vs. Static**:
- The key to understanding equilibrium is recognizing that it is a dynamic state. This means that even though the concentrations are constant, the reactions continue to occur in both directions (forward and backward).

4. **Rate of Reactions**:
- At equilibrium, the rate of the forward reaction (reactants forming products) is equal to the rate of the reverse reaction (products forming reactants). This balance is what defines the dynamic nature of equilibrium.

5. **Conclusion**:
- Therefore, the state of equilibrium is best described as a **dynamic state**, where reactions continue to occur but at equal rates, resulting in constant concentrations.

### Final Answer:
The state of equilibrium refers to a **dynamic state**.

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