Nitrogen dioxide cannot be obtained by heating:

Concentrated $HNO_3$ is a yellow-colored liquid due to:

Identify the correct set of $13^{th}$ group elements which do not form amphoteric oxides?

Match the List-$I$ with List-$II$.

List-$I$ (Family)	List-$II$ (Symbol of Element)
$A$. Pnictogen (group $15$)	$I$. $Ts$
$B$. Chalcogen	$II$. $Og$
$C$. Halogen	$III$. $Lv$
$D$. Noble gas	$IV$. $Mc$

Choose the correct answer from the options given below:

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:

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