MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

As we move down the group of noble gases, the atomic size increases and the ionization enthalpy decreases. Xenon has a relatively low ionization enthalpy, which allows its valence electrons to be excited to empty d-orbitals. This enables Xenon to form compounds with highly electronegative elements like fluorine and oxygen. Xenon exhibits higher oxidation states such as +2, +4, +6, and +8 in compounds like XeF _2, XeF _4, XeF _6, XeO _3, and XeO _4. Neon and Argon do not form stable compounds, and Krypton only forms KrF _2 with an oxidation state of +2. Therefore, Xenon exhibits higher oxidation states. Answer: Xe