Lithium aluminium hydride can be prepared from the reaction of

The chemical formulas of $A$,$B$,and $C$ are:
$A + Na_2CO_3 \to B + C$
$A \xrightarrow{CO_2} \text{Milky cloud}, C$

Magnesium is manufactured by electrolysing fused magnesium chloride using

Give reasons: Aluminium utensils should not be kept in water overnight.

The alkali metal with the lowest $E^{\circ}_{M^{+}/M} (V)$ is $X$ and the alkali metal with the highest $E^{\circ}_{M^{+}/M} (V)$ is $Y$. Then $X$ and $Y$ are respectively:

Select the correct statement from the following.