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NEET2015Chemistrys Block ElementsActual

Which of the following has highest hydration energy?

Options

  1. AMgCl ₂
  2. BCaCl ₂
  3. CBaCl ₂
  4. DSrCl ₂

Correct answer

A. MgCl ₂

Step-by-step solution

Smaller sized and highly charged ions have higher hydration energy. In the alkaline earth metals, the hydration energy of the compact ions is greater than the large sized ions. Therefore, order of hydration energy in this group is Be ²⁺> Mg ²⁺> Ca ²⁺> Sr ²⁺> Ba ²⁺ .

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