Characteristic feature of alkali metals is

Why are alkali metals not found in nature?

In the Solvay process,can we obtain sodium carbonate directly by treating the solution containing $(NH_4)_2CO_3$ with sodium chloride? Explain.

List-$I$ Elements	List-$II$ Colour imparted to the flame
$A$. $K$	$i$. Violet
$B$. $Ca$	$ii$. Brick Red
$C$. $Sr$	$iii$. Crimson Red
$D$. $Ba$	$iv$. Apple Green

Choose the correct answer from the options given below:

$STATEMENT-1$: Alkali metals dissolve in liquid ammonia to give a blue solution because
$STATEMENT-2$: Alkali metals in liquid ammonia give solvated species of the type $[M(NH_3)_n]^{+}$ ($M=$ alkali metals).

Choose the correct statement from the following.