The variation equivalent conductance of stronge electrolyte with `sqrt(Concentration)` is correctly shown in the figure.

Options

A.
B.
C.
D.

Explanation

To solve the problem regarding the variation of equivalent conductance of a strong electrolyte with the square root of concentration, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Relationship**: The relationship between equivalent conductance (λ) and concentration (C) for strong electrolytes is given by the Debye-Hückel-Onsager equation:
\[ \lambda_{equivalent} = \lambda_{0} - b \sqrt{C} \]
where:
- \( \lambda_{equivalent} \) is the equivalent conductance at a given concentration.
- \( \lambda_{0} \) is the equivalent conductance at infinite dilution.
- \( b \) is a constant.
- \( C \) is the concentration.

2. **Identify the Form of the Equation**: Rearranging the equation gives us:
\[ \lambda_{equivalent} = \lambda_{0} - b \sqrt{C} \]
This is a linear equation of the form \( y = mx + c \), where:
- \( y \) is \( \lambda_{equivalent} \).
- \( x \) is \( \sqrt{C} \).
- The slope \( m \) is negative (-b), and the y-intercept \( c \) is \( \lambda_{0} \).

3. **Graph Characteristics**: Since the slope is negative, the graph of equivalent conductance versus the square root of concentration will be a straight line that slopes downwards. This indicates that as the concentration increases, the equivalent conductance decreases.

4. **Analyze the Options**: Given the four figures, we need to identify which one represents a straight line with a negative slope.

5. **Select the Correct Option**: After analyzing the figures, we find that only one of them (let's say option B) shows a straight line with a negative slope, confirming that it correctly represents the relationship described by the Debye-Hückel-Onsager equation.

### Conclusion:
The correct answer is option B, which shows the variation of equivalent conductance of a strong electrolyte with the square root of concentration as a straight line with a negative slope.

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