The compound that cannot exist with xenon is

Does the hydrolysis of $XeF_{6}$ lead to a redox reaction?

Select the $INCORRECT$ statement regarding the following reactions:
$XeF_6 + \text{excess } H_2O \rightarrow 'X' + HF$
$XeF_6 + 2 \text{ moles } H_2O \rightarrow 'Y' + HF$

$XeF_6$ on complete hydrolysis gives:

Identify the set which is not correctly matched in the following.

Which group of elements are all gases under normal conditions?