The electronic structure of molecule $OF_2$ is a hybrid of

Describe the change in hybridisation (if any) of the $Al$ atom in the following reaction.
$AlCl_{3} + Cl^{-} \longrightarrow AlCl_{4}^{-}$

Which pair of molecules has different hybridisation but the same shape?

In which one of the following pairs do the two species have identical shape,but differ in hybridisation?

Which among the following molecules is $(a)$ involved in $sp^3d$ hybridization,$(b)$ has different bond lengths and $(c)$ has a lone pair of electrons on the central atom?

Which of the following is true for carbon suboxide $(C_3O_2)$?