The thermal stability of alkaline earth metal | vedclass

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Question

(A) The thermal stability of alkaline earth metal carbonates increases as we move down the group from $Mg$ to $Ba$. This is because the electropositiv

Vedclass · Accepted Answer

$BaCO_{3} > SrCO_{3} > CaCO_{3} > MgCO_{3}$

Vedclass · Answer

(A) The thermal stability of alkaline earth metal carbonates increases as we move down the group from $Mg$ to $Ba$. This is because the electropositive character of the metal increases down the group,which leads to a stronger ionic bond between the metal cation and the carbonate anion. Consequently,more energy is required to decompose the carbonate into the metal oxide and carbon dioxide. Therefore,the correct order of thermal stability is $BaCO_{3} > SrCO_{3} > CaCO_{3} > MgCO_{3}$.

List-$I$	List-$II$
$a$. $Be$	$i$. Treatment of cancer
$b$. $Mg$	$ii$. Extraction of metals
$c$. $Ca$	$iii$. Incendiary bombs and signals
$d$. $Ra$	$iv$. Windows of $X$-ray tubes
	$v$. Bearings for motor engines

The thermal stability of alkaline earth metal carbonates $MgCO_{3}$,$CaCO_{3}$,$SrCO_{3}$,and $BaCO_{3}$ follows the order:

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