Which of the following plots represents correctly the variation of molar conductivity with dilution for a strong electrolyte?

Options

A.
B.
C.
D.

Answer

A

Explanation

This is the general shape of molar conductivity-dilution curve for a strong electrolyte. The second graph is for a weak electrolyte. The second graph is for a wak electrolyte. Similar graphs are obtained when we plot equivalent conductivity against dilution.
For a strong electrolyte, the graph reaches a maximum at low concentrations, and the `Lambda_(m)^(0)` value can be obtained by extrapolation from the experimental curve. For a weak elecrolyte, the graph would also reach a maximum at a low concentration but readings cannot be obtained experimentally, at such low concentrations.
The third graph is obtained when we plot molar or equivalent conductivity of a stronfg electrolyte against `sqrtC` while the fourth graph is obtained when we plot molar or equivalent conductivity of a weak electrolyte against `sqrtC`.