Q.

The formation of O2+[PtF6]- is the basis for the formation of xenon fluorides. This is because:

1 O2 and Xe have comparable sizes  
2 both O2 and Xe are gases  
3 O2 and Xe have comparable ionization energies  
4 O2 and Xe have same electron gain enthalpy  

Ans.

(3)

O2 and Xe have comparable ionization energies