The reaction of elemental $P_4$ and aqueous $NaOH$ gives

The oxidation number of phosphorus varies from

How can you explain the higher stability of $BCl_3$ as compared to $TlCl_3$?

$P_2O_3 + H_2O \rightarrow X$
$Red \ P_4 + \text{alkali} \rightarrow Y$
$X$ and $Y$ are oxoacids of phosphorus. The number of $P-OH$ bonds in $X$ and $Y$ respectively is:

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

Which of the following does not give oxygen on heating?