Among the following,the pair in which the two species are not isostructural is

Which of the following compounds is octahedral?

The molecular shapes of $SF_4, CF_4$,and $XeF_4$ are:

Identify the molecule $(X)$ with the maximum number of lone pairs of electrons (obtained using Lewis dot structure) among $HNO_{3}$, $H_{2}SO_{4}$, $NF_{3}$, and $O_{3}$. Choose the correct bond angle made by the central atom of the molecule $(X)$. (in $^{\circ}$)

The shape of $IF_7$ molecule is

$XH_3 + H^{+} \longrightarrow XH_4^{+} (X = N, P, As, Sb)$. In this process,the maximum increase in bond angle will be in the case of $:-$