Among the following metals,which one has the lowest probable interatomic forces?

The reason why alkali metals impart color to the Bunsen burner flame is ......

Identify the correct statements from the following.
$A$: Alkali metals are strong reducing agents.
$B$: $KO_2$ is a diamagnetic oxide.
$C$: Hydration enthalpy of $Li^{+}$ is the highest among alkali metal ions.

The commercial production of sodium carbonate is done by

When sodium is heated in excess of air,which of the following compounds are obtained?

$I. Na_3N$	$II. Na_2O$
$III. NaO_2$	$IV. Na_2O_2$

Select the correct statement from the following.