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Question
Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?
Options
MgCO3
CaCO3
SrCO3
BaCO3
Solution
BaCO3
Explanation:
Thermal stability of metal carbonates increases as the electropositive character of the metal or the basicity of the metal hydroxide increases from Be(OH)2 to Ba(OH)2. Thus, BaCO3 is the most stable.
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