The variation of $\lambda_{m}$ of acetic acid with concentration is correctly represented as:

Specific conductance of $0.1 \, M$ nitric acid is $6.3 \times 10^{-2} \, \Omega^{-1} cm^{-1}$. The molar conductance of the solution is ............... $\Omega^{-1} cm^2 mol^{-1}$.

Explain Kohlrausch law of independent migration of ions.

At $291 \ K$,a saturated solution of $BaSO_4$ was found to have a specific conductivity of $3.648 \times 10^{-6} \ \Omega^{-1} \ cm^{-1}$ and that of the water used is $1.25 \times 10^{-6} \ \Omega^{-1} \ cm^{-1}$. If the ionic conductances of $Ba^{2+}$ and $SO_4^{2-}$ are $110$ and $136.6 \ \Omega^{-1} \ cm^2 \ mol^{-1}$ respectively,the solubility of $BaSO_4$ at $291 \ K$ will be (Atomic masses: $Ba=137, S=32, O=16$)

Calculate the molar conductivity of $NH_4OH$ at infinite dilution if the molar conductivities of $Ba(OH)_2$,$BaCl_2$,and $NH_4Cl$ at infinite dilution are $520$,$280$,and $129 \ \Omega^{-1} \ cm^2 \ mol^{-1}$ respectively.

Explain the conduction of electricity in metals and non-metals.