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MHT CET202619 April 2026Morning ShiftChemistryd and f Block ElementsActual

What is the highest possible oxidation state exhibited by manganese ?

Options

  1. A+8
  2. B+5
  3. C+6
  4. D+7

Correct answer

D. +7

Step-by-step solution

The atomic number of manganese (Mn) is 25 . Its electronic configuration is [Ar] 3d⁵ 4s² . The highest oxidation state is achieved when all the valence electrons (both 4s and 3d electrons) participate in bonding. Total number of valence electrons = 5 + 2 = 7 . Therefore, the highest possible oxidation state exhibited by manganese is +7 , which is seen in compounds like KMnO₄ and Mn₂O₇ . Answer: +7

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