The shape of $IF_6^-$ is

The structure of $PF_5$ molecule is

Match the following:
$($Molecule$/$Ion$)$  $($Shape$)$
$A. I_3^- \rightarrow  4.$ Linear  
$B. ClF_3 \rightarrow  1.$ $T-$shaped  
$C. H_2O \rightarrow  3.$ Angular  
$D. SF_4 \rightarrow  2.$ See$-$Saw

Fluorine reacts with dilute $NaOH$ and forms a gaseous product $A$. The bond angle in the molecule of $A$ is

In which of the following molecules/ions are all the bonds not equal?

What is bond angle? Explain.