The structure of $XeF_{6}$ is experimentally determined to be a distorted octahedron. Its structure according to $VSEPR$ theory is

Give the correct order of initials $T$ or $F$ for following statements. Use $T$ if statement is true and $F$ if it is false:
$(I)$ The order of repulsion between different pair of electrons is $lp-lp > lp-bp > bp-bp$.
$(II)$ In general,as the number of lone pair of electrons on the central atom increases,the deviation of the bond angle from the normal bond angle increases.
$(III)$ The number of lone pairs on $O$ in $H_2O$ is $2$,while on $N$ in $NH_3$ is $1$.
$(IV)$ The structures of xenon fluorides and xenon oxyfluorides could not be explained on the basis of $VSEPR$ theory.

In which of the following molecules are all bond lengths the same?

The bond angle in $A$ is $X$ and the bond angle in $B$ is $Y$. What are $X$ and $Y$?

$A$	$B$
$CH_3OH$	$CH_3OCH_3$

What is the shape of gaseous $SnCl_2$?

The molecular shapes of $SF_4$,$CF_4$,and $XeF_4$ are