Which one of the following elements has the oxidation state as +7 ?

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Which one of the following elements has the oxidation state as +7 ?

Nitrogen
Phosphorus
Manganese
Magnesium
This question was previously asked in
UPSC CISF-AC-EXE – 2018
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The correct answer is Manganese.
Manganese (Mn) is a transition metal that can exhibit various oxidation states, including +2, +3, +4, +6, and +7. In compounds like potassium permanganate (KMnO4), Manganese has an oxidation state of +7.
Nitrogen typically exhibits oxidation states ranging from -3 to +5 (e.g., +5 in HNO3 or N2O5). Phosphorus typically exhibits oxidation states of -3, +3, and +5 (e.g., +5 in H3PO4 or P4O10). Magnesium is an alkaline earth metal and almost exclusively exhibits an oxidation state of +2 in its compounds. Therefore, among the given options, only Manganese can have an oxidation state of +7.

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