Arrange the following solutions in the decreasing order of specific conductance.
(i) 0.01 M NaCl (ii) 0.05 M NaCl (iii) 0.1 M NaCl (iv) 0.5 M NaCl

Explanation

To arrange the given solutions in decreasing order of specific conductance, we need to consider the following factors:

1. **Concentration of the Solution**: The specific conductance (κ) of an electrolyte solution is directly proportional to the concentration of ions in the solution. As the concentration of the solution increases, the number of ions increases, leading to higher specific conductance.

2. **Type of Electrolyte**: In this case, all solutions are sodium chloride (NaCl), which dissociates completely in water to give Na⁺ and Cl⁻ ions. Therefore, the specific conductance will depend solely on the concentration of the NaCl solution.

Now, let's analyze the given solutions:

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