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JEE Main · 2024 · 29 Jan 2024 · Shift 2 · p-Block Elements

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Anomalous behaviour of oxygen is due to its
  1. (A)Large size and high electronegativity
  2. (B)Small size and low electronegativity
  3. (C)Small size and high electronegativity✓ Correct
  4. (D)Large size and low electronegativity

Answer: (C)

Solution

Oxygen, the first member of Group 16, behaves anomalously compared to the heavier members (S, Se, Te) because of its small atomic size combined with high electronegativity.

Its small size concentrates charge density, favouring strong multiple bonding (as in , and -type bonds that heavier congeners resist forming) and permitting strong hydrogen bonding, while its high electronegativity drives its strongly oxidising chemistry.

Oxygen's anomalous behaviour arises from its small size and high electronegativity.

JEE Main · 2024 · 29 Jan 2024 · Shift 2 · Single correct option

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