The structure of ammonia is:

In which of the following is the bond angle maximum?

Molecules in which all fluorine atoms are in the same plane is:

The bond angle between two bonds in a water molecule is ............... $^o$?

$XeF_4$ is square planar while $XeF_6$ has a distorted octahedral structure. What is the correct explanation for this observation?

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: