In $XeF_{4}$,the hybridization is:

Which is the correct statement?
As the $s$-character of a hybrid orbital decreases:
$(I)$ The bond angle decreases
$(II)$ The bond strength increases
$(III)$ The bond length increases
$(IV)$ Size of orbitals increases

The hybridisations of the atomic orbitals of nitrogen in $NO_{2}^{-}$,$NO_{2}^{+}$ and $NH_{4}^{+}$ respectively are.

In which of the following molecules the central atom does not have $sp^3$ hybridization?

Select the systematic diagram which represents the correct change in the bond angle in the hybrid orbital of beryllium.

From left to right, $sp^2, sp^2, sp, sp$ hybridisation is present in