How does the graph of molar conductivity vs square root of concentration look like for NaCl?

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Solution

The correct option is C
NaCl is a strong electrolyte.
For strong electrolytes, $\land m$ increases slowly with dilution and can be represented by the equation:
$\land_{m} = \land_{m}^{\circ} - k \sqrt{C}$ When it plotted on a graph with $\land_{m} a n d \sqrt{C}$ as axes, it is a straight line with negative slope.

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