The basicity of the hydroxides of the following alkali metals is of the order:

Match the following:

Compound	Uses
$1$. Soda ash	$a$. In purification of sugar
$2$. Calcium oxide	$b$. As an antacid
$3$. Baking soda	$c$. In paper and textile industries
	$d$. To prepare pure fats and oils

Identify the $CORRECT$ decreasing order of melting point of cluster of sodium atoms depending on size.

Which of the following orders is correct with respect to the magnitude of enthalpies of formation for alkali metal halides?

Given below are two statements:
Statement $I$ : The $4f$ and $5f$-series of elements are placed separately in the Periodic table to preserve the principle of classification.
Statement $II$ : $S$-block elements can be found in pure form in nature.
In the light of the above statements,choose the most appropriate answer from the options given below :

Which of the following will be dissolved in excess of $NaOH$?