Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?

Metal carbonates decompose on heating to give metal oxide and carbon d

1.	Metal carbonates decompose on heating to give metal oxide and carbon dioxide. Which of the metal carbonates is most stable thermally?
Answer» `MgCO_(3)` `CaCO_(3)` `SiCO_(3)` `BaCO_(3)` Solution :Thermal stability of `MCO_(3)` Group-2 depends on the MO. If MO is stable `MCO_(3)`is thermally unstable and vice versa. `MCO_(3) to MO+CO_(2)`. Thermal stability of MO decreases as the size of M increases. Therefore, BaO is least stable and `BaCO_(3)`is most stable.