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BITSAT2022Chemistrys Block ElementsActual

Which of the following compounds is thermodynamically is the most stable?

Options

  1. ABaCO ₃
  2. BMgCO ₃
  3. CSrCO ₃
  4. DCaCO ₃

Correct answer

A. BaCO ₃

Step-by-step solution

The thermal stability of carbonates increases down the group. So, the order of thermal stability of carbonates of alkaline earth metals is BaCO ₃> CaCO ₃> MgCO ₃> BeCO ₃ . Therefore, BaCO ₃ is thermodynamically most stable and BeCO ₃ is least stable.

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