What is the shape of the ammonia $(NH_3)$ molecule?

The molecule $ML_x$ is planar with $7$ pairs of electrons around $M$ in the valence shell. The value of $x$ is

What is the number of lone pairs of electrons on the central atom in $XeF_2, XeF_4$,and $XeF_6$ molecules,respectively?

Number of compounds with one lone pair of electrons on the central atom amongst the following is . . . . . . $O_3, H_2O, SF_4, ClF_3, NH_3, BrF_5, XeF_4$

The structure of $XeF_{6}$ is experimentally determined to be a distorted octahedron. Its structure according to $VSEPR$ theory is

The correct statement regarding the number of lone pairs on the central atoms of the molecules $SF_4$,$CF_4$,and $XeF_4$ is: