The $P-P-P$ bond angle in white phosphorus is

Among the members of $V$ $A$ group ($N$,$P$,$As$,$Sb$,and $Bi$),which of the following properties shows an increase as we go down from nitrogen to bismuth?

Phosphorus forms a number of oxoacids. Out of these oxoacids,phosphinic acid $(H_3PO_2)$ has strong reducing properties. Write its structure and also write a reaction showing its reducing behavior.

The atomicity of phosphorus is $X$ and the $P-P-P$ bond angle in the molecule is $Y$. What are $X$ and $Y$?

Dinitrogen and dioxygen,the main constituents of air,do not react with each other in the atmosphere to form oxides of nitrogen because:

Which of the following oxides of nitrogen does not contain an $N-N$ bond?