Which graph will show equilibrium condition?

Options

A.
B.
C.
D. None of these

Answer

To determine which graph shows the equilibrium condition in a chemical reaction, we can follow these steps:

### Step 1: Understand the Concept of Equilibrium
In a reversible reaction, equilibrium is reached when the rate of the forward reaction equals the rate of the backward reaction. At this point, the concentrations of reactants and products remain constant over time.

### Step 2: Analyze the Given Graphs
We have three graphs to analyze, each representing the concentration of reactants and products over time. We need to identify which graph indicates that the concentrations have stabilized, showing that equilibrium has been reached.

### Step 3: Evaluate Each Graph
1. **Graph 1**: Initially shows a higher concentration of reactants and a lower concentration of products. As time progresses, the concentration of reactants decreases, and that of products increases. However, it does not indicate a point where concentrations become constant.

2. **Graph 2**: Similar to Graph 1, it shows the concentration of reactants decreasing and products increasing over time. Again, it does not clearly show a stable point indicating equilibrium.

3. **Graph 3**: This graph starts with a higher concentration of reactants and a concentration of products at zero. As time progresses, the concentration of reactants decreases, and the concentration of products increases. Importantly, it indicates a point where both concentrations become constant, suggesting that equilibrium has been reached.

### Step 4: Identify the Correct Graph
Based on the analysis, **Graph 3** is the only graph that shows the concentrations of reactants and products stabilizing over time, indicating that equilibrium has been achieved.

### Final Answer
The correct answer is **Option 3**.

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