Which of the following salts is not soluble in water?

Assertion : Both $Be$ and $Al$ can form complexes such as $BeF_4^{2-}$ and $AlF_6^{3-}$ respectively,$BeF_6^{3-}$ is not formed.
Reason : In case of $Be$,no vacant $d-$ orbitals are present in its outermost shell.

$Ba$,$Ca$,and $Sr$ form halide hydrates. Their formulas are $BaCl_2 \cdot x H_2 O$,$CaCl_2 \cdot y H_2 O$,and $SrCl_2 \cdot z H_2 O$. The values of $x$,$y$,and $z$ respectively are:

Alkaline earth metals (except $Be$) can easily lose their valence electrons,so how do they behave?

An element reacts with hydrogen to form a compound $A$,which on treatment with water liberates hydrogen gas. The element can be

Which alkaline earth metal carbonate decomposes most easily?