What is the bond angle of $H-O-H$ in $H_2O$ (in $^\circ$)?

The number of bent-shaped molecule/s from the following is $.....$. $N_3^{-}$,$NO_2^{-}$,$I_3^{-}$,$O_3$,$SO_2$

Which of the following is a non-linear molecule?

Which of the following compounds has the smallest bond angle $(X - A - X)$ in each series respectively?
$(A) \ OSF_2 \ \ \ \ \ \ \ \ \ OSCl_2 \ \ \ \ \ \ \ \ \ OSBr_2$
$(B) \ SbCl_3 \ \ \ \ \ \ \ \ \ SbBr_3 \ \ \ \ \ \ \ \ \ SbI_3$
$(C) \ PI_3 \ \ \ \ \ \ \ \ \ \ \ \ AsI_3 \ \ \ \ \ \ \ \ \ \ \ \ SbI_3$

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

Select from each set the molecule or ion having the smallest bond angle:
$(i)$ $NH_3, PH_3$ or $AsH_3$
$(ii)$ $O_3^+, O_3$
$(iii)$ $NO_2^-$ or $O_3$
$(iv)$ $X-S-X$ angle in $SOCl_2$ and $SOF_2$