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Lowest oxide of transition is basic while highest is acidic. so MnO is basic and Mn2O7 is acidic
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lowest oxide of transition is basic and the highest is acidic.MnO has the lowest oxidation state, so it is the most basic. Mn2O3 is next, then MnO2, and finally Mn2O7 (which is actually acidic)as it is the highest

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