Oxidation of $NO$ in air produces

In the following reaction,identify the nature of the products formed by the complete hydrolysis of $\underline{P}_4O_8$ at $R.T$:
$\underline{P}_4O_8 + H_2O \longrightarrow H_3PO_3 + H_3PO_4$

Write a note on $p$-block elements of the periodic table.

What is the correct order of acidic character for the given oxides?

Which of the following set of elements is present in apatite?

Discuss the general characteristics of Group $15$ elements with reference to their electronic configuration,oxidation state,atomic size,ionisation enthalpy and electronegativity.