Question

The equivalent conductance of ${NaCl}$ at concentration $C$ and at infinite dilution are $\lambda_C$ and $\lambda_{\infty}$, respectively. The correct relationship between $\lambda_C$ and $\lambda_{\infty}$ is given as (where, the constant $B$ is positive)

(a) $\lambda_C=\lambda_{\infty}+(B) \sqrt{C}$

(b) $\lambda_C=\lambda_{\infty}+(B) C$

(c) $\lambda_C=\lambda_{\infty}-(B) C$

(d) $\lambda_C=\lambda_{\infty}-(B) \sqrt{C}$

Answer 1

Correct Option : (D)

Explanation :

According to Debye-Huckel's theory, for a strong electrolyte (like ${NaCl}$ ),

$\lambda_C=\lambda_{\infty}-(B) \sqrt{C}$