The thermal stability of alkaline earth metal carbonates $MgCO_3$,$CaCO_3$,$BaCO_3$,and $SrCO_3$ decreases as:

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

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Match the following alkaline earth metals with their respective densities $(g/cm^3)$:
$A$. $Be$$I$. $1.74$
$B$. $Mg$$II$. $1.84$
$C$. $Ca$$III$. $2.63$
$D$. $Sr$$IV$. $1.55$

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State whether the following statements are True or False:
$(1)$ Plaster of Paris is used to join fractured bones and keep them immobilized.
$(2)$ Calcium carbonate and soil are the raw materials for cement production.

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$(I)$ $Ca_2SiO_4$ $(II)$ $Ca_3SiO_5$ $(III)$ $Ca_3Al_2O_6$

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