In $CH_4$ molecule,the hydrogen atoms around carbon are arranged as

The percentage of $s$-character in the hybrid orbitals of nitrogen in $NO_{2}^{+}$ and $NO_{3}^{-}$ respectively are:

Explain $sp^3d^2$ hybridization with a suitable example.

The outer orbitals of $C$ in ethene molecule can be considered to be hybridized to give three equivalent $sp^2$ orbitals. The total number of sigma $(\sigma)$ and pi $(\pi)$ bonds in ethene molecule is

In which hybridization is the bond angle the highest?

What is the type of chemical covalent bond between the carbon-carbon atoms in $C_2H_4$?