Question

Which one of the following graphs between molar conductivity $\left({\Lambda }_{\mathrm{m}}\right)$ versus $\sqrt{C}$ is correct?

• A.
• B.
• C.
• D.

Answer 1

Answer: (B)

Both $NaCl$ and $KCl$ are strong electrolytes and as $\text{N}{\text{a}}^{+}$ (aq) has less conductance than $K^{+}$ (aq) due to more hydration of $\text{N}{\text{a}}^{+}$ (g) due to small size and more hydration energy therefore the graph of option (B) is correct here.

Extent of hydration $\propto \frac{1}{{\Lambda }_m}$