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NEET 2007
Exam
NEET
Year
2007
Subject
Chemistry
Chapter
Classification of Elements and Periodicity in Properties

NEET 2007 · Chemistry · Classification of Elements and Periodicity in Properties

Which of the following ionic species has the greatest proton...

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

Options

  1. ANH2−\mathrm{NH}_2^{-}
  2. BF−\mathrm{F}^{-}
  3. C1−1^{-}
  4. DHS−\mathrm{HS}^{-}

Correct answer

A. NH2−\mathrm{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. ⇒\Rightarrow Proton affinity →\rightarrow Nitrogen family >> Oxygen family >> Halogens
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