1.

To correct the order of stability of group II A metal carbonates isA. `MgCO_3 gtCaCO_3gtSrCO_3gtBaCO_3`B. `BaCO_3 gtSrCO_3gtCaCO_3gtMgCO_3`C. `SrCO_3gtBaCO_3gtCaCO_3gtMgCO_3`D. `CaCO_3gtMgCO_3gtBaCO_3gtSrCO_3`

Answer» Correct Answer - B
`Mg^(2+)` is smallest in size hence , show high polarising power. Thus , `MgCO_3` is most covalent and least stable. Stability increases on moving down the group.


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