Among the following alkaline earth metal halides,the one which is covalent and soluble in organic solvents is:

Heating a solid compound $X$ produces $CO_2$ gas and a residue. Adding water to this residue produces compound $Y$. Passing excess $CO_2$ gas through a solution of $Y$ produces a clear solution $Z$. Boiling $Z$ regenerates compound $X$. What is compound $X$?

Which of the following elements does not react with water?

$ZnO$ when heated with $BaO$ at $1100\,^{\circ}C$ gives a compound. Identify the compound.

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:

In which of the following groups all the three members are of the alkaline earth metals family?