$NO , N _{2} O , B _{2} O _{3}, N _{2} O _{5}, CO$, $SO _{3}, P _{4} O _{10}$
Acidic Oxides - $B _{2} O _{3}, N _{2} O _{5}, SO _{3}, P _{4} O _{10}$
$Xe{{F}_{6}}\,\xrightarrow{+\,Excess\,\,{{H}_{2}}O}\,'X'\,+\,HF$
$Xe{{F}_{6}}\,\xrightarrow{+\,2\,\,{{H}_{2}}O}\,'Y'\,+\,HF$