Which of the following produces hydrolith with dihydrogen?

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

From which of the following is the hydration energy of $Mg^{2+}$ larger?

Which of the following reactions does not take place?

$Assertion$ $(A)$: Helium and beryllium have similar outer electronic configuration $ns^2$. $Reason$ $(R)$: Both are chemically inert.

Consider the following statements:
Statement-$I$: Both $BeSO_4$ and $MgSO_4$ are readily soluble in water.
Statement-$II$: Among the nitrates of alkaline earth metals,only $Be(NO_3)_2$ on strong heating gives its oxide,$NO_2$,and $O_2$.