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Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?
(i) MgCO_{3}
(ii) CaCO_3
(iii) SrCO_3
(iv) BaCO_3

Answers (1)

The answer is the option (iv) MCO_{3}\rightarrow MO+CO_{2}

 

Thermal stability of MCO_{3} depends on the stability of MO. If MO is stable MCO_{3} is unstable and vice versa

BaO is least stable making BaCO_{3} most stable.

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