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

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$BaCO_3 > SrCO_3 > CaCO_3 > MgCO_3$

(A) The thermal stability of alkaline earth metal carbonates increases as we move down the group from $Be$ to $Ba$.This is because the ionic character of the metal-oxygen bond increases as the size of the metal cation increases,making the carbonate ion more stable against decomposition.The order of ionic radii is $Mg^{2+} Therefore,the thermal stability order is $MgCO_3 SrCO_3 > CaCO_3 > MgCO_3$.

Class 11 Chemistry Data Entry - Chemistry Level 0 of all question bank

Which of the following is the correct decreasing order of thermal stability of alkaline earth metal carbonates?

A
$BaCO_3 > SrCO_3 > CaCO_3 > MgCO_3$
B
$BaCO_3 > SrCO_3 > MgCO_3 > CaCO_3$
C
$CaCO_3 > SrCO_3 > MgCO_3 > BaCO_3$
D
$MgCO_3 > CaCO_3 > SrCO_3 > BaCO_3$

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Which of the following is the correct decreasing order of thermal stability of alkaline earth metal carbonates?

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