The molecular geometry of $SF_6$ is octahedral. What is the geometry of $SF_4$ (including lone pair$(s)$ of electrons,if any)?

In which of the following conversions does a planar compound change into a non-planar compound?
$(a)$ $ClF_3 \rightarrow ClF_4^{-}$
$(b)$ $NH_2^{-} \rightarrow NH_4^{+}$
$(c)$ $I_3^{+} \rightarrow I_3^{-}$
$(d)$ $SO_2 \rightarrow SO_3$

Decreasing order of bond angle is

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

Which of the following hydrides has the largest bond angle?

In the structure of $SF_{4}$,the lone pair of electrons on $S$ is in ....