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NEET2007ChemistryClassification of Elements and Periodicity in PropertiesActual

Which of the following ionic species has the greatest proton affinity to form stable compound?

Options

  1. ANH ₂⁻
  2. BF ⁻
  3. C1⁻
  4. DHS ⁻

Correct answer

A. NH ₂⁻

Step-by-step solution

Proton affinity decreases in moving across the period from left to right due to increase in charge. Within a group the proton affinities decreases from top to bottom. Proton affinity Nitrogen family > Oxygen family > Halogens

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