Which of the carbonates given below is unstable in air and is kept in co, atmosphere to avoid decomposition ?

Which of the carbonates given below is unstable in air and is kept in

1.	Which of the carbonates given below is unstable in air and is kept in co, atmosphere to avoid decomposition ?
Answer» `BeCO_(3)` `MgCO_(3)` `CaCO_(3)` `BaCO_(3)` Solution :`BeCO_(3)` is stable only in atmosphere of `CO_(2)`. It is unstable due to strong polarizing effect of small SIZE of `Be^(2+)` ion.