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Out of the following, how many oxides ar...

Out of the following, how many oxides are acidic. MnO, `Mn_(2)O_(3), MnO_(2), MnO_(3), Mn_(2)O_(7)`.

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The correct Answer is:
3
Lower O.S. compounds are basic and higher O.S. compounds are acidic.
`underset("netural")overset(+2)(MnO, Mn_(2)O_(3)), underset("Acidic")(MnO_(2)^(+4), MnO_(3)^(+6), Mn_(2)O_(7)^(+7))`
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