List of top Chemistry Questions on Conductance of Electrolytic Solutions asked in CBSE Class XII

Why is DC not used for measuring resistance of ionic solution?
Why is direct current (DC) not used to measure the resistance of an ionic solution?
Define conductivity and molar conductivity for a solution of an electrolyte. Why does the conductivity of a solution decrease with decrease in concentration?
Define limiting molar conductivity.
The conductivity of \(0.001\,M\) solution of acetic acid is \(3.905\times10^{-5}\,S\,cm^{-1}\). Calculate its molar conductivity and degree of dissociation (\(\alpha\)). Given : \[ \lambda^\circ_{H^+}=349.6\,S\,cm^2\,mol^{-1} \] \[ \lambda^\circ_{CH_3COO^-}=40.9\,S\,cm^2\,mol^{-1} \]
Why does a mercury cell deliver a constant voltage for its entire life?
Why is it necessary to use salt bridge in a galvanic cell?
Give reasons for the following:
\[ \text{The conductivity of }0.001M\text{ solution of acetic acid is }3.905\times10^{-5}\;S\,cm^{-1}.\text{ Calculate its molar conductivity and degree of dissociation }(\alpha). \]
\[ \lambda^\circ_{CH_3COO^-}=40.9\;S\,cm^2mol^{-1} \]
\[ \lambda^\circ_{H^+}=349.6\;S\,cm^2mol^{-1} \]
State Kohlrausch's law of independent migration of ions. With the help of a curve, explain why it is not easy to determine \(\Lambda_m^\circ\) for weak electrolytes by extrapolating the concentration--molar conductivity curve, as it is for strong electrolytes.
State Kohlrausch's law of independent migration of ions. With the help of a curve, explain why it is not easy to determine \(\Lambda_m^\circ\) for weak electrolytes by extrapolating the concentration--molar conductivity curve, as it is for strong electrolytes.
The conductivity of 0·001 M acetic acid is $\mathrm{3.905\times10^{-5}}$ S $\mathrm{cm^{-1}}$. Calculate its molar conductivity and degree of dissociation $\mathrm{(\alpha)}$. [Given : $\mathrm{\lambda^\circ_{CH_3COO^-} = 40.9}$, $\mathrm{\lambda^\circ_{H^+} = 349.6\ S\,cm^2\,mol^{-1}}$]
State Kohlrausch's law of independent migration of ions. With the help of a curve, explain why it is not easy to determine $\mathrm{\Lambda^\circ_m}$ for weak electrolytes by extrapolating the concentration – molar conductivity curve, as it is for strong electrolytes.