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(D) The molar conductivity $\Lambda_{m}$ is related to the degree of dissociation $\alpha$ and limiting molar conductivity $\Lambda_{m}^{\circ}$ by th

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$8 	imes 10^{-4}$

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(D) The molar conductivity $\Lambda_{m}$ is related to the degree of dissociation $\alpha$ and limiting molar conductivity $\Lambda_{m}^{\circ}$ by the formula: $\Lambda_{m} = \alpha 	imes \Lambda_{m}^{\circ}$.Substituting the given values: $\Lambda_{m} = 0.02 	imes 400 = 8.0 \ S \ cm^2 \ mol^{-1}$.The conductivity $\kappa$ is related to molar conductivity $\Lambda_{m}$ and concentration $C$ (in $mol \ L^{-1}$) by: $\kappa = \frac{\Lambda_{m} 	imes C}{1000}$.Substituting the values: $\kappa = \frac{8.0 	imes 0.1}{1000} = 0.8 	imes 10^{-3} = 8 	imes 10^{-4} \ S \ cm^{-1}$.

The conductivity of a solution of concentration $0.1 \ mol \ L^{-1}$ of a weak monobasic acid $(HA)$ (in $S \ cm^{-1}$) is (Given $\Lambda_{HA}^{\circ}=400 \ S \ cm^2 \ mol^{-1}$ and degree of dissociation $(\alpha)$ of $HA=0.02$)

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