$MgCl_2 \cdot 6H_2O$ when heated gives:

Give a brief explanation of the ionisation enthalpy of alkaline earth metals (Group-$2$) elements.

Which property of the alkaline earth metals increases with their atomic number?

Which of the following salts is not soluble in water?

Statement $A$: Calcium chloride $(CaCl_2)$ is not useful for drying alcohols or $NH_3$.
Reason $R$: $CaCl_2$ is not a good desiccant.

Given below are two statements:
Statement $I$: None of the alkaline earth metal hydroxides dissolve in alkali.
Statement $II$: Solubility of alkaline earth metal hydroxides in water increases down the group.
In the light of the above statements,choose the most appropriate answer from the options given below: