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Question: Answered & Verified by Expert
An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to
ChemistryElectrochemistryNEETNEET 2010 (Screening)
Options:
  • A increase in ionic mobility of ions
  • B $100 \%$ ionisation of electrolyte at normal dilution
  • C increase in both, ie, number of ions and ionic mobility of ions
  • D increase in number of ions
Solution:
2917 Upvotes Verified Answer
The correct answer is: increase in ionic mobility of ions
Key Idea $\lambda_{\text {eq }}=\kappa \times \mathrm{V}=\frac{\mathrm{k} \times 1000}{\text { normality }}$.
On dilution, the number of current carrying particles per $\mathrm{cm}^3$ decreases but the volume of solution increases. Consequently, the ionic mobility increases, which in turn increases the equivalent conductance of strong electrolyte.

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