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The correct order of following 3d metal oxides, according to their oxidation numbers is : (a) CrO3 (b) Fe2O3 (c) MnO2 (d) V2O5

1. (1) (d) > (a) > (b) > (c) > (e)
2. (2) (a) > (c) > (d) > (b) > (e)
3. (3) (a) > (d) > (c) > (b) > (e)
4. (4) (c) > (a) > (d) > (e) > (b)

Correct answer: (1) (d) > (a) > (b) > (c) > (e)

Solution

The correct order is based on the oxidation states of the metals in the oxides, where V in V2O5 has the highest oxidation state of +5, followed by Cr in CrO3 with +6, Fe in Fe2O3 with +3, and Mn in MnO2 with +4, making option (1) the accurate sequence.

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