Identify the bond angle $O-S-O$ in the $SO_2$ molecule. (in $^{\circ}$)

The number of species from the following that have pyramidal geometry around the central atom is . . . . . . . . .
$S_2O_3^{2-}, SO_4^{2-}, SO_3^{2-}, S_2O_7^{2-}$

The shape of $IF_6^-$ is

The $H-C-H$ bond angle in $CH_4$ is $109.5^{\circ}$. Due to lone pair repulsion,the $H-O-H$ angle in $H_2O$ will:

Molecular shapes of $SF_4$,$CF_4$ and $XeF_4$ are

Which of the following molecules has two lone pairs of electrons in the valence shell of its central atom?