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Question
Among Group 16 elements, which one does NOT show -2 oxidation state?
Options
A.Te
B.Po
C.O
D.Se
Solution
Sol. [Key Concept: Group 16 oxidation state trend]
The official NEET 2024 answer is polonium, option (2), reflecting the NCERT trend that the −2 oxidation state becomes less favoured down Group 16 and is rarely shown by Po. The wording does NOT show is too absolute: −2 polonium is known in polonides, including Na₂Po. Therefore the historical exam answer is retained, but it must not be taken to mean that −2 polonium is chemically impossible. Positive oxidation states including +2, +4 and +6 are known for Po.
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