Thermal stability of BaCO_3, CaCO_3, SrCO_3 a | vedclass

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(D) The thermal stability of alkaline earth metal carbonates increases as the size of the metal cation increases.This is because the larger cation pol

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$BaCO_3 > SrCO_3 > CaCO_3 > MgCO_3$

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(D) The thermal stability of alkaline earth metal carbonates increases as the size of the metal cation increases.This is because the larger cation polarizes the carbonate ion less effectively,making the $C-O$ bond stronger and the compound more stable.The ionic radii of the cations follow the order: $Mg^{2+} Therefore,the thermal stability follows the order: $MgCO_3 Thus,the decreasing order of thermal stability is $BaCO_3 > SrCO_3 > CaCO_3 > MgCO_3$.

Thermal stability of $BaCO_3, CaCO_3, SrCO_3$ and $MgCO_3$ decreases in the order of :

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