Thermal decomposition of zinc nitrate gives:

Match the following alkaline earth metals with their respective densities $(g/cm^3)$:

$A$. $Be$	$I$. $1.74$
$B$. $Mg$	$II$. $1.84$
$C$. $Ca$	$III$. $2.63$
$D$. $Sr$	$IV$. $1.55$

What is the chemical formula for Plaster of Paris?

The halides of alkaline earth metals form hydrates such as $MgCl_2 \cdot 6H_2O$,$CaCl_2 \cdot 6H_2O$,$BaCl_2 \cdot 2H_2O$,and $SrCl_2 \cdot 2H_2O$. This indicates that the halides of group $2$ elements are:

Out of the following elements,which one do you expect to be most reactive chemically?

The incorrect order of solubility in water is