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KVPY2017Chemistrys Block Elements

The thermal stability of alkaline earth metal carbonates- MgCO ₃, CaCO ₃, SrCO ₃ and BaCO ₃ , follows the order

Options

  1. ABaCO ₃> SrCO ₃> CaCO ₃> MgCO ₃
  2. BCaCO ₃> SrCO ₃> BaCO ₃> MgCO ₃
  3. CMgCO ₃> CaCO ₃> SrCO ₃> BaCO ₃
  4. DSrCO ₃> CaCO ₃> MgCO ₃> BaCO ₃

Correct answer

A. BaCO ₃> SrCO ₃> CaCO ₃> MgCO ₃

Step-by-step solution

Thermal stability of polyvalent anion salt like CO ₃²⁻ increase down the group due to increase in ionic character

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