Nitric acid oxidises phosphorus to

Determine whether the following statements are True $(T)$ or False $(F)$:
$1.$ Ammonia is produced from a mixture of $SO_2$ and $N_2$.
$2.$ $N_2H_2$ and $N_2H_4$ are formed from a mixture of $N_2/H_2$ in the Haber process.
$3.$ Compounds of $d$ or $f$ block elements are not used as catalysts in the Haber process.

$N_2$ forms $NCl_3$,whereas $P$ can form both $PCl_3$ and $PCl_5$. Why?

Aluminium is usually found in $+3$ oxidation state. In contrast,thallium exists in $+1$ and $+3$ oxidation states. This is due to

White phosphorus is heated with concentrated $NaOH$ in $CO_2$ atmosphere to form a gas $A$ and compound $B$. When $A$ is bubbled into aqueous $CuSO_4$ solution,copper phosphide and $C$ are formed. $B$ and $C$ are respectively:

Which of the following compounds is the most explosive?