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QAIPMT-2007-Ch-2297: NEET 2007 Chemistry - Class 11 AIPMT-2007-Ch-2297 Solution: Which one of the following ionic species has the greatest…

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

Multiple Choice Options

  • A NH2−NH_2^-
  • B F−F^-
  • C I−I^-
  • D HS−HS^-

Step-by-Step Verified Solution

Going from left to right across a period in the periodic table, the basicity decreases as the electronegativity of the atom possessing the lone pair of electron increases. Hence basicity of N H 2 _ is higher than F - . In moving down a group, as the atomic mass increases, basicity decreases. Hence F - is more basic than I - and HO - is more basic than HS-. Hence among the ionic species, N H 2 _ has maximum proton affinity.

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