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Question 860002
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d- and f-Block Elements: Variable oxidation states MCQ

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Variable oxidation statesEasyQuestion 860002

Question

Transition metals show variable oxidation states because:
  1. A
    Both (n−1)d and ns electrons participate in bonding
    Correct
  2. B
    Their d-orbitals are empty
  3. C
    They have large atomic radii
  4. D
    They are metals

Correct answer

Both (n−1)d and ns electrons participate in bonding

Explanation

Transition metals can lose electrons from both the ns and (n−1)d subshells, which are close in energy. This allows multiple stable oxidation states. E.g., Mn: +2 (d⁵), +4 (MnO₂), +6, +7 (KMnO₄).

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