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(B) Electrolyte $B$ is a strong electrolyte,and electrolyte $A$ is a weak electrolyte.Statement $(A)$ is incorrect because $\Lambda_m^0$ for a weak el

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$2$

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(B) Electrolyte $B$ is a strong electrolyte,and electrolyte $A$ is a weak electrolyte.Statement $(A)$ is incorrect because $\Lambda_m^0$ for a weak electrolyte $(A)$ cannot be obtained by extrapolation; it is calculated using Kohlrausch's law.Statement $(B)$ is correct because strong electrolytes follow the Debye-$H$ückel-Onsager equation: $\Lambda_m = \Lambda_m^0 - A\sqrt{c}$,which is a straight line.Statement $(C)$ is incorrect because at infinite dilution,the degree of dissociation $(\alpha)$ for any electrolyte approaches $1$ (or $100\%$),not zero.Statement $(D)$ is correct because Kohlrausch's law of independent migration of ions states that $\Lambda_m^0$ can be calculated for any electrolyte using the limiting molar conductivities of its individual ions.Therefore,statements $(A)$ and $(C)$ are incorrect. The total number of incorrect statements is $2$.

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