Which of the following graphs are correct for strong electrolyte `AD` and `AB`.

Options

A.
B.
C.
D.

Explanation

To determine which graphs are correct for strong electrolytes AD and AB, we need to analyze the relationship between molar conductivity and concentration for strong electrolytes.

### Step-by-Step Solution:

1. **Understanding Molar Conductivity**:
- The molar conductivity (Λ) of a strong electrolyte is given by the equation:
\[ \Lambda = \Lambda_0 - B \sqrt{C} \]
where:
- \( \Lambda_0 \) is the molar conductivity at infinite dilution,
- \( B \) is a positive constant,
- \( C \) is the concentration of the electrolyte.

2. **Graph Representation**:
- In the equation, if we compare it with the linear equation \( y = mx + c \):
- \( y \) corresponds to molar conductivity (Λ),
- \( x \) corresponds to \( \sqrt{C} \),
- The slope \( m \) is equal to \(-B\),
- The y-intercept \( c \) is equal to \( \Lambda_0 \).

3. **Characteristics of the Graph**:
- Since the equation represents a straight line, the graph of molar conductivity versus \( \sqrt{C} \) should be a straight line.
- The y-intercept indicates the molar conductivity at infinite dilution, which should differ for different electrolytes.

4. **Analyzing the Options**:
- **Option 1**: This graph shows a straight line with the same y-intercept for both electrolytes. This is incorrect because different electrolytes cannot have the same molar conductivity at infinite dilution.
- **Option 2**: This graph also shows a straight line, but with different y-intercepts for the two electrolytes. This is correct as it indicates that the molar conductivities at infinite dilution for AD and AB are different.
- **Option 3**: This graph is curved, which is not possible for strong electrolytes as per the linear relationship we derived.
- **Option 4**: Similar to option 3, this graph is also curved, which is incorrect.

5. **Conclusion**:
- The only correct graph for the strong electrolytes AD and AB is **Option 2**, as it shows a straight line with different y-intercepts.

### Final Answer:
The correct graph for strong electrolytes AD and AB is **Option 2**.