1.

Which of the following is least thermally stable ?

Answer»

`MgCO_(3)`
`CaCO_(3)`
`SeCO_(3)`
`BeCO_(3)`

Solution :`BeCO_(3)` is least thermally stable. We KNOW, for the alkaline EARTH METAL carbonates, thermally tability order is
`BeCO_(3) lt MgCO_(3) lt CaCO_(3) lt SrCO_(3) lt BaCO_(3)`


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