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An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to:A. increase in number of ionsB. increase in ionic mobility of ionsC. `100%` ionisation of electrolyte at normal dilutionD. increase in both number of ions and ionic mobility of ions

Answer» Correct Answer - B
By definition, a strong electrolyte ionizes or dissociates almost completely. At high concentration, the average distance between ions is very small. Consequently,they may re combine to form ion-pairs, which have no contribution to conductance. With dilution, the average distance between ions increases. This leads to decrease in tendency to form ion pairs. In other words, the ionic mobility increases as more and more ions arc able to participate.


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