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Periodic Table and Periodicity question

2007 · Q94
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Periodic Table and Periodicity question

2007 · Q94

NEETChemistryPeriodic Table and PeriodicityMCQ+4 / −1
Which one of the following ionic species has the greatest proton affinity to form stable compound ?
  1. A
    NH2−_2^ -2−​
  2. B
    F−-−
  3. C
    I−-−
  4. D
    HS−-−
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