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Question 860011
JEE Chemistry · Medium

d- and f-Block Elements: Mixed MCQ

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MixedMediumQuestion 860011

Question

Transition metals in higher oxidation states form:
  1. A
    Covalent/oxo compounds (like CrO₃, Mn₂O₇)
    Correct
  2. B
    Simple ionic compounds only
  3. C
    Insoluble precipitates
  4. D
    No compounds

Correct answer

Covalent/oxo compounds (like CrO₃, Mn₂O₇)

Explanation

In higher oxidation states (+6, +7), the metal ion has high charge density and polarises anions significantly → covalent bonds form. CrO₃ (Cr +6), Mn₂O₇ (Mn +7, an oily liquid), OsO₄ (Os +8) are covalent. Lower states (+2) → ionic (FeCl₂, MnCl₂).

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