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

Vedclass · Accepted Answer

$BaCO_3 > SrCO_3 > CaCO_3 > MgCO_3$

Vedclass · Answer

(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 $BaCO_3 > SrCO_3 > CaCO_3 > MgCO_3$.

$A$. Calcium	$p$. Brick red
$B$. Strontium	$q$. Apple green
$C$. Barium	$r$. Crimson

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

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