$H_3PO_3$ is

Select the incorrect statement regarding trihalides $(EX_3)$ and pentahalides $(EX_5)$ of the nitrogen family.

Which of the following properties of white phosphorus are shared by red phosphorus?

Identify the incorrect statement from the following:

Which of the following properties is true for the given sequence? $NH_{3} > PH_{3} > AsH_{3} > SbH_{3} > BiH_{3}$

What are $X$ and $Y$, respectively in the following reactions?
$Au + \text{aqua regia} \longrightarrow AuCl_4^{-} + H_2O + X$
$Pt + \text{aqua regia} \longrightarrow PtCl_6^{2-} + H_2O + Y$