Which of the following substances has the minimum bond angle?

Consider the following reactions:
$2 Cu_2S + 3 O_2 \rightarrow 2 Cu_2O + 2 SO_2$
$2 Cu_2O + Cu_2S \rightarrow 6 Cu + SO_2 \uparrow$
Here,$X$ is $Cu_2S$ and $Y$ is $SO_2$. The shape of the molecule $Y$ is:

Consider the following species: $(A)$ $BrF_4^{\ominus}$, $(B)$ $CH_4$, $(C)$ $IF_4^{\oplus}$, $(D)$ $XeF_4$, $(E)$ $XeO_2F_2$. Which of these species are isostructural with $SF_4$?

The three-dimensional structure of $CH_4$ is given below. The bonds are labelled as $W, X, Y$ and $Z$. What are the bonds lying in the plane $(A)$,projecting out of the plane away from the observer $(B)$ and projecting out of the plane towards the observer $(C)$?

What are the formal charges on the terminal oxygen atoms of the ozone $(O_3)$ molecule?

Which of the following is a non-linear molecule?