The set that represents the pair of neutral oxides of nitrogen is :

Concentrated nitric acid,upon long standing,turns yellow-brown due to the formation of

Which among the following group-$15$ elements forms hydrogen bonding in its hydride compounds?

The chemical formula for the phosphorus molecule is:

At what temperature is white phosphorus heated to obtain red phosphorus (in $K$)?

The $15^{th}$ group of the periodic table contains elements $N, P, As, Sb,$ and $Bi$. As we move from $N$ to $Bi$,how do the oxides with the general formula $E_2O_3$ behave?