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Chemistry · PYQ NEET UG 2017

हिन्दी

Ionic mobility of which of the following alkali metal ions is lowest when aqueous solutions of their salts are put under an electric field?

  1. Na
  2. K
  3. Rb
  4. Li

Correct answer · Option 4

Li

Explanation

Lithium ion (\( \text{Li}^+ \)) has the highest charge density, resulting in maximum hydration in aqueous solution. Thus, its hydrated radius is largest, making its ionic mobility lowest.
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