On dilution, the **conductivity** ($\kappa$) of an electrolyte solution:
AIncreases
BFirst decreases then increases
CRemains constant
DDecreases
Answer & Solution
Correct answer: D. Decreases
Conductivity = conductance of 1 cm³ — depends on **ions per unit volume**. On dilution, although more electrolyte dissociates, ions per unit volume drop (volume grows faster), so $\kappa$ decreases.
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