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Transition metals have the ability to utilize (n−1)d-orbitals. Thus variable oxidation states enable the transition element to associate with the reactants in different forms.

1. Oxides of transitional metals in low oxidation state i.e., +2 and +3 are generally basic except Cr₂O₃.
2. Mn: [Ar]3d⁵4s² shows +2, +3, +4, +5, +6 & +7 oxidation states.
3. Manganese shows max. no. of oxidation states, +2, +3, +4, +5, +6, +7.
4. Other metals show the following oxidation states: Cr = +2, +3, +4, +5, +6; Fe = +2, +3; Ti = +2, +3, +4.

Correct answer: Manganese shows max. no. of oxidation states, +2, +3, +4, +5, +6, +7.

Solution

Manganese exhibits the maximum number of oxidation states among transition metals due to its electronic configuration ([Ar]3d⁵4s²), allowing it to lose electrons from both 3d and 4s orbitals. This makes option C correct.

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