Which of the carbonates given below is unstable in air and is kep in CO_(2) atmosphere to avoid decomposition .

Which of the carbonates given below is unstable in air and is kep in C

1.	Which of the carbonates given below is unstable in air and is kep in CO_(2) atmosphere to avoid decomposition .
Answer» `BeCO_(3)` `MgCO_(3)` `CaCO_(3)` `BaCO_(3)` Solution :Due to least ELECTROPOSITIVE character or least basicity of `Be(OH)_(2), BeCO_(3)` is LESS stable and hence decompose to give BEO and `CO_(2)` . Since the decomposition reaction is reversible , therefore to increase the stability of `BeCO_(3)` or to reverse the above equilibrium , `BeCO_(3)` is kept in an atmosphere of `CO_(2)` . `BeCO_(3) hArr BeO + CO_(2)`