The ionic mobility of alkali metal ions in aqueous solution is maximum for :
Correct answer: D. Rb+
- A. Li+
- B. Na+
- C. K+
- D. Rb+
Explanation
The ionic mobility of an ion in aqueous solution is inversely related to the extent of hydration. Smaller ions like Li+ are heavily hydrated, leading to larger effective sizes and reduced mobility. As ion size increases, hydration decreases, resulting in higher mobility. Rb+ ions, being the largest, experience the least hydration and have the highest mobility. Therefore, Rb+ is the correct answer. The other options (Li+, Na+, K+) are incorrect because they are smaller ions that are more heavily hydrated, limiting their mobility in solution.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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