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JEE Main 2003
Exam
JEE Main
Year
2003
Subject
Chemistry
Chapter
s Block Elements

JEE Main 2003 · Chemistry · s Block Elements

The solubilities of carbonates decrease down the magnesium group...

The solubilities of carbonates decrease down the magnesium group due to a decrease in

Options

  1. Ahydration energies of cations
  2. Binter-ionic attraction
  3. Centropy of solution formation
  4. Dlattice energies of solids

Correct answer

A. hydration energies of cations

Step-by-step solution

The solubility is governed by ΔHsolution \Delta \mathrm{H}_{\text{solution }} i.e. ΔHsolution =ΔHlattice −ΔHHydration \Delta \mathrm{H}_{\text{solution }}=\Delta \mathrm{H}_{\text{lattice }}-\Delta \mathrm{H}_{\text{Hydration }}. Due to increase in size the magnitude of hydration energy decresaes and hence the solubility.
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