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Periodic Table and Periodicity question

2024 · 29 Jan · Shift 2 · Q14
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Periodic Table and Periodicity question

2024 · 29 Jan · Shift 2 · Q14

JEE MainChemistryPeriodic Table and PeriodicityMCQ+4 / −1
Anomalous behavior of oxygen is due to its
  1. A
    large size and low electronegativity
  2. B
    small size and high electronegativity
  3. C
    small size and low electronegativity
  4. D
    large size and high electronegativity
View written solutionFree

Correct answer: B

  1. Reason for anomalous behavior in oxygen
    Oxygen shows anomalous behavior compared to other group 16 elements because of two main factors:

    • very small atomic size
    • high electronegativity

  2. Why these factors matter
    Due to its small size, oxygen has high electron density and strong interelectronic repulsions.
    Due to its high electronegativity, it attracts electrons strongly and forms bonding patterns different from heavier congeners like sulfur, selenium, etc.

  3. Evaluate the options

    • A: large size and low electronegativity Incorrect, oxygen is neither large nor low in electronegativity.
    • B: small size and high electronegativity Correct.
    • C: small size and low electronegativity Incorrect, oxygen has high electronegativity.
    • D: large size and high electronegativity Incorrect, oxygen is small in size.

  4. Final answer
    Therefore, the anomalous behavior of oxygen is due to its small size and high electronegativity.

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