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NEETChemistryd and f Block Elements

Why is the E ⊖ value for the Mn 3+ /Mn 2+ couple much more positive than that for Cr 3+ /Cr 2+ or Fe 3+ /Fe 2+ ?

Options

  1. ACr and Fe have a greater affinity for oxygen.
  2. Bdue to the much larger third ionization energy of Mn (where the required change is d 5 to d 4 )
  3. CMn forms stronger bonds with ligands than Cr and Fe.
  4. DMn has a higher ionization energy than Cr and Fe.

Correct answer

B. due to the much larger third ionization energy of Mn (where the required change is d 5 to d 4 )

Step-by-step solution

Correct Option is : (B) due to the much larger third ionization energy of Mn (where the required change is d 5 to d 4 )

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