The hydroxide of alkaline earth metal,which has the lowest value of solubility product $(K_{sp})$ at normal temperature $(25^{\circ} C)$ is

What is the use of Plaster of Paris?

As the alkaline earth metals (except $Be$) tend to lose their valence electrons readily,they act as:

The product obtained on fusion of $BaSO_4$ and $Na_2CO_3$ is

Explain the physical properties of alkaline earth metals (Group $2$).

Identify the correct statements with respect to compounds of Beryllium:
$I$. Beryllium oxide is amphoteric in nature.
$II$. Beryllium hydride is formed by the reaction of beryllium with hydrogen.
$III$. Beryllium hydride is formed by the reaction of beryllium chloride with lithium aluminium hydride.
$IV$. Beryllium sulphate is the least soluble sulphate among the sulphates of alkaline earth metals.