When the specific conductivity of a weak electrolyte is plotted on y-axis of the graph and the concentration along the x-axis, the graph shows:
A
steady increase in conductivity with concentration.
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B
the conductivity rising to a maximum, then remaining constant as concentration increases.
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C
a decrease in conductivity with concentration.
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D
none of these
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Solution
The correct option is B the conductivity rising to a maximum, then remaining constant as concentration increases. As the concentration decreases or dilution increases, the specific conductance of a solution falls with dilution, as the number of current-carrying particles present per unit volume of the solution becomes less and less on dilution.
Thus, when the concentration increases, the conductivity rises to a maximum and reaches a limiting value and then, it remains constant.