Noble gases are named because of their inertness towards reactivity. Identify an incorrect statement about them.

Select the incorrect statement.

The shape of $XeOF_4$ molecule is

Which element does not react with $F_2$?

Which of the following compounds does not exhibit the maximum oxidation state?

The noble gases have closed-shell electronic configuration and are monoatomic gases under normal conditions. The low boiling points of the lighter noble gases are due to weak dispersion forces between the atoms and the absence of other interatomic interactions.
The direct reaction of xenon with fluorine leads to a series of compounds with oxidation numbers $+2, +4$ and $+6$. $XeF_4$ reacts violently with water to give $XeO_3$. The compounds of xenon exhibit rich stereochemistry and their geometries can be deduced considering the total number of electron pairs in the valence shell.
$1.$ Argon is used in arc welding because of its
$A.$ low reactivity with metal
$B.$ ability to lower the melting point of metal
$C.$ flammability
$D.$ high calorific value
$2.$ The structure of $XeO_3$ is
$A.$ linear
$B.$ planar
$C.$ pyramidal
$D.$ $T$-shaped
$3.$ $XeF_4$ and $XeF_6$ are expected to be
$A.$ oxidizing
$B.$ reducing
$C.$ unreactive
$D.$ strongly basic
Give the answer for questions $1, 2$ and $3$.