The structure of ammonia is:

$A$ central atom in a molecule has two lone pairs of electrons and forms three single bonds. The shape of this molecule is

Which of the following is planar?

The number of species from the following which have a square pyramidal structure is $PF_{5}$,$BrF_{4}^{-}$,$IF_{5}$,$BrF_{5}$,$XeOF_{4}$,$ICl_{4}^{-}$.

Which of the following molecular species is not linear?

Amongst the following,the number of species having a linear shape is $...........$
$XeF_2, I_3^{+}, C_3O_2, I_3^{-}, CO_2, SO_2, BeCl_2$ and $BCl_2^{\Theta}$