Heating white phosphorus with conc. $NaOH$ solution gives mainly

It is because of the inability of $ns^{2}$ electrons of the valence shell to participate in bonding that:

What is the chemical formula of sodium pyrophosphate?

Which of the following represents the correct order of the inert pair effect?

Which of the following elements does not form stable diatomic molecules?

Elements $X$ and $Y$ belong to Group $15$. The difference between the electronegativity values of $X$ and phosphorus is higher than that of the difference between phosphorus and $Y$. $X$ and $Y$ are respectively: