STATEMENT 1 : The molar conductivity of strong electrolyte decreases with increases in concentration and
STATEMENT 2 AT high concentration migration of ion is slow

Options

A. Statement 1 is ture , Statement 2 is true Statement 2 is correct explanation for Statement 1
B. Statement 1 is true Statement 2 is ture Statement 2 is NOT a correct explantion for Statement 1
C. Statement 1 is true statement 2 is ture
D. Statement 1 is false Statement 2 is true

Answer

To analyze the given statements, we can break down the concepts of molar conductivity and the behavior of strong electrolytes at different concentrations.

### Step-by-Step Solution:

1. **Understanding Molar Conductivity**:
- Molar conductivity (Λm) is defined as the conductivity (κ) of an electrolyte solution divided by its molar concentration (C).
- Formula: \( \Lambda_m = \frac{\kappa}{C} \)

2. **Effect of Concentration on Molar Conductivity**:
- For strong electrolytes, as the concentration increases, the number of ions per unit volume increases initially, leading to an increase in conductivity.
- However, at high concentrations, the ions are closer together, leading to increased interactions (ion-ion interactions) which can hinder their movement.

3. **Observation at High Concentration**:
- As concentration increases, the mobility of ions decreases due to these interactions, which results in a decrease in molar conductivity.
- Therefore, the first statement is true: "The molar conductivity of strong electrolyte decreases with increases in concentration."

4. **Understanding Ion Migration**:
- The second statement mentions that "at high concentration migration of ions is slow."
- This is true because, as mentioned earlier, the increased interactions between ions at high concentrations impede their movement, leading to slower migration.

5. **Conclusion**:
- Both statements are correct. The first statement is about the behavior of molar conductivity with concentration, and the second statement explains why this behavior occurs (slow migration of ions at high concentration).
- Therefore, Statement 2 is indeed a correct explanation of Statement 1.

### Final Answer:
Both statements are true, and Statement 2 is the correct explanation for Statement 1. Thus, the answer is **Option A**.

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