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Most Important Selected Qs for JEE AdvancedChemistryChemical Bonding and Molecular Structure

Which of the following cannot be explained on the basis of Fajan's Rules?

Options

  1. AAg ₂ ~S is much less soluble than Ag ₂ O
  2. BFe ( OH )₃ is much less soluble than Fe ( OH )₂
  3. CBaCO ₃ is much less soluble than MgCO ₃
  4. DMelting point of AlCl ₃ is much less than that of NaCl

Correct answer

C. BaCO ₃ is much less soluble than MgCO ₃

Step-by-step solution

BaCO ₃ is much less soluble than MgCO ₃ due to lower hydration energy of Ba ²⁺ ion than that of Mg ²⁺ ion.

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