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Which of the following statements is incorrect ?

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Which of the following statements is incorrect ?

(a) Li+ has minimum degree of hydration.

(b) The oxidation state of K in KO2 is +1.

(c) Na is used to make a Na/Pb alloy.

(d) MgSO4  is readily soluble in water. 

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Best answer

Correct option (a) Li+ has minimum degree of hydration.

Explanation:

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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