Question

Molar conductance $Λ_{m}$ is plotted against $\sqrt{C} \left(mol \, L^{-1}\right)$ for three electrolytes $\left(NaCl, HCl, NH_{4}OH\right).$
$\begin{matrix}\left(1\right)&\left(2\right)&\left(3\right)\end{matrix}$

• A. $\begin{matrix}BaCl_{2}&HCl&NH_{4}OH\end{matrix}$
• B. $\begin{matrix}HCl&BaCl_{2}&NH_{4}OH\end{matrix}$
• C. $\begin{matrix}NH _{4}OH&NaCl&HCl\end{matrix}$
• D. $\begin{matrix}NH_{4} OH&HCl&NaCl\end{matrix}$

Answer 1

Answer: (B)

Electrolytes like acetic acid,$NH_{4}OH$ have a low value at high concentration and there is a rapid increase in the value of equivalent conductance with dilution. Such electrolytes are termed as weak electrolytes.