Analyse the following reactions and choose the correct information about the same.

${\mathrm{CaC}}_2+{\mathrm{N}}_2\stackrel{1200 \mathrm{K}}{⟶}\mathrm{X}+\mathrm{C}\left(\mathrm{s}\right)$

$\mathrm{X}+{\mathrm{H}}_2\mathrm{O}\stackrel{\mathrm{\Delta }}{⟶}\mathrm{Y}\downarrow +\mathrm{Z}\left(\mathrm{g}\right)$

$\mathrm{a}.$ $\mathrm{X}$ is ${\mathrm{CaCN}}_2$.

$\mathrm{b}.$ The mixture of $\mathrm{X}$ and $\mathrm{C} \left(\mathrm{s}\right)$ is called nitrolim.

$\mathrm{c}.$ $\mathrm{Z} \mathrm{is} {\mathrm{NH}}_3$.

$\mathrm{d}.$ $\mathrm{X}\text{ is }\mathrm{Ca}(\mathrm{CN}{)}_2$.

 

${\mathrm{HNO}}_3+{\mathrm{P}}_4{\mathrm{O}}_{10}\to {\mathrm{HPO}}_3+{\mathrm{N}}_2{\mathrm{O}}_5$

The role of ${\mathrm{P}}_4{\mathrm{O}}_{10}$ in the given reaction is:

Identify incorrect statements:

a. Moist ammonia gas can be dried by using anhydrous ${\mathrm{CaCl}}_2$.

b. ${{\mathrm{NO}}_3}^{-}$ and ${{\mathrm{PO}}_3}^{3-}$ are isostructural.

c. Phosphine is a stronger base than ammonia because phosphorus atom is less electronegative than nitrogen.

d. Sodium hypophosphine is an acidic salt.