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NEET2014Chemistrys Block ElementsActual

Which of the following statements is incorrect?

Options

  1. ALi ⁺ has minimum degree of hydration.
  2. BThe oxidation state of K in KO ₂ is +1 .
  3. CNa is used to make a Na / Pb alloy.
  4. DMgSO ₄ is readily soluble in water.

Correct answer

A. Li ⁺ has minimum degree of hydration.

Step-by-step solution

The hydration enthalpies of alkali metal ions decreases with increase in ionic sizes Hence, the order is Li ⁺> Na ⁺> K ⁺> Rb ⁺> Cs ⁺ . Therefore, Li ⁺ has maximum degree of hydration.

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