Given below are two statements: Statement I: For KI, molar conductivity increases steeply with dilution. Statement II:…

Strategy: Distinguish between the dilution behavior of strong and weak electrolytes. Identify the electrolyte type for $\ce{KI}$ and Carbonic acid.

Analysis:

• KI: This is a strong electrolyte. According to the Debye-Hückel-Onsager equation, its molar conductivity increases slowly and linearly with the square root of concentration upon dilution. Statement I is false because it claims a "steep" increase.
• Carbonic acid ($\ce{H_2CO_3}$): This is a weak electrolyte. At moderate concentrations, the increase is slow, but it rises steeply only at extremely high dilutions. Statement II is generally ac\cepted as true compared to KI.

Conclusion: Statement I is false, Statement II is true.

$\boxed{\text{Answer: (d) Statement I is false but Statement II is true}}$