Which of the following compounds are paramagnetic in nature?

Statement $A$: Extraction of magnesium is done by the electrolysis of a molten mixture of $MgCl_2$,$NaCl$,and $CaCl_2$.
Reason $R$: Calcium chloride acts as a reducing agent.

Which of the following reactions is not involved in the Solvay process?

Match List-$I$ with List-$II$.

List-$I$ (Alkali Metal)	List-$II$ (Emission Wavelength in $nm$)
$A$. $Li$	$I$. $589.2$
$B$. $Na$	$II$. $455.5$
$C$. $Rb$	$III$. $670.8$
$D$. $Cs$	$IV$. $780.0$

Choose the correct answer from the options given below:

On dissolving a moderate amount of sodium metal in liquid $NH_3$ at low temperature,which one of the following does not occur?

Compound $A$ reacts with $NH_4Cl$ and forms a compound $B$. Compound $B$ reacts with $H_2O$ and excess of $CO_2$ to form compound $C$,which on reaction with saturated $NaCl$ solution forms sodium hydrogen carbonate. Compounds $A, B$ and $C$ are respectively: