Which of the following electrolytic solutions has the least specific conductance?

Options

A. 2N
B. 0.002N
C. 0.02N
D. 0.2N

Explanation

To determine which of the given electrolytic solutions has the least specific conductance, we need to analyze the options based on their concentrations.

### Step-by-Step Solution:

1. **Understanding Specific Conductance**:
- Specific conductance (κ) is defined as the conductance of a solution per unit length and is influenced by the number of ions present in the solution. The more ions present, the higher the specific conductance.

2. **Analyzing the Given Options**:
- The options provided are:
- Option 1: Normal (assumed to be 1 N)
- Option 2: 0.002 Normal
- Option 3: 0.002 Normal
- Option 4: 0.002 Normal
- Here, we can see that the first option has a higher concentration (1 N) compared to the other three options (0.002 N).

3. **Comparing Concentrations**:
- The specific conductance is directly proportional to the concentration of ions in the solution. Therefore, the solution with the lowest concentration will have the least specific conductance.
- Since all three options (2, 3, and 4) have the same concentration (0.002 N), they will have the same specific conductance, which will be lower than that of the first option (1 N).

4. **Conclusion**:
- Among the options, the solution with the least specific conductance is the one with the lowest concentration, which is 0.002 Normal. Thus, any of the options 2, 3, or 4 can be considered correct, but since they are identical, we can state that option 2 is the answer.

### Final Answer:
- The electrolytic solution with the least specific conductance is **0.002 Normal** (Option 2).

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