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)`
`SrCO_(3)`
`BaCO_(3)`

SOLUTION :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 `BaCO_(3)` is most stable .


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