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Question

On increasing the dilution of an electrolytic solution, it' s conductivity:

A
increases
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B
decreases
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C
remain unchanged
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D
first increases and then decreases
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Solution

The correct option is B decreases
Conductivity always decreases with the decrease in concentration for both weak and strong electrolyte.

Conductivity is the conductance of unit volume of electrolytic solution. So, the conductance depends on the number of ions present in the unit volume.

During dilution, the ions moves fastly so the number of ions in the unit volume will decrease. Hence, conductivity of the solution decreases with dilution.

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