Which of the following is not linear?

The correct order of $H-M-H$ bond angle is

Among the following species,the correct set of isostructural pairs is:
$XeO_3, CO_3^{2-}, SO_3, H_3O^{+}, ClF_3$

In which of the following molecules are all the bonds not equal?

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 $^{\circ}$)

Among $CH_4$,$CO_2$,$H_2O$ and $SO_2$,the bond angle is the highest in