What are the products formed when an aqueous solution of magnesium bicarbonate is boiled?

Identify correct statements from the following:
$i$. Beryllium oxide is an amphoteric oxide.
$ii$. Group $II$ elements dissolve in liquid ammonia to form deep blue-black solutions.
$iii$. The hydration enthalpy of group $II$ ions decreases from $Be^{2+}$ to $Ba^{2+}$.

Choose the incorrect statement.

$A$ white solid '$A$' on heating gives off a gas which turns lime water milky. The residue is yellow when hot but turns white on cooling. This solid '$A$' is

Select the correct statement from the following.

Which of the following properties of the alkaline earth metals increase from $Be$ to $Ba$?
$(i)$ Atomic radius
$(ii)$ Ionisation energy
$(iii)$ Nuclear charge