$Na_2CO_3$ is manufactured by the Solvay process. The products that are recycled are:

The solubility of alkali metal fluorides increases down the group. Select the correct explanation for the given statement.

Give the general electronic configuration of alkali metals and provide the electronic configuration for each element of the alkali metal group.

The correct statements are:
$I$. The low solubility of $LiF$ is due to its high lattice enthalpy.
$II$. $LiBr$ is soluble in acetone.
$III$. $LiCl$ is soluble in pyridine.
$IV$. The order of melting points of alkali metal halides is $MF > MCl > MBr > MI$.

Which element from the following forms a chlorophyll complex?

Lithium aluminium hydride can be prepared from the reaction of