The covalent alkaline earth metal halide $(X = Cl, Br, I)$ is:

Which of the following represents the correct order of solubility in water?

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 $SrCl_2 \cdot 2H_2O$. What does this indicate about the halides of group $2$ elements?

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

Which ion has the maximum complex-forming tendency?

Which element among the alkaline earth metals primarily forms covalent compounds?