Question
What is the highest possible oxidation state exhibited by manganese ?
MHT CET
Chemistry
d and f Block Elements
2026
MHT CET 2026 (19 April Shift 1)
MHT CET Chemistry Question (2026) — Solution
Options
- A. +8
- B. +5
- C. +6
- D. +7
Answer
D. +7
Step-by-step solution
The atomic number of manganese (Mn) is 25. Its electronic configuration is [Ar] 3d^ 5 4s^ 2 . 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 KMnO_ 4 and Mn_ 2 O_ 7 . Answer: +7
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