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NEET2001ChemistryChemical Bonding and Molecular StructureActual

Assertion : Na ₂ SO ₄ is soluble in water while BaSO ₄ is not. Reason : Lattice energy of BaSO ₄ exceeds its hydration energy.

Options

  1. AIf both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  2. BIf both Assertion and Reason are true but Reason is not the correct explanation of Assertion.
  3. CIf Assertion is true but Reason is false.
  4. DIf Assertion is false but Reason is true.

Correct answer

A. If both Assertion and Reason are true and Reason is the correct explanation of Assertion.

Step-by-step solution

The large sized sulphate anion ( SO ₄ ²⁻ ) is stabilised better by a large sized cation. So the stability of sulphates down the group increases so the lattice energy is more in BaSO ₄ than in Na ₂ SO ₄ .

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