The compound that cannot exist with xenon is

The correct order of enthalpy of vaporisation of noble gases is

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

Which of the following molecules is planar?

The shape of $XeOF_4$ molecule is

Which elements were discovered by the scientists Ramsay and Glenn $T$. Seaborg?