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What is `RbO_2` is

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`RbO_2` is
A. Peroxide and paramagnetic
B. Peroxide and magnetic
C. Super oxide and paramagnetic
D. Super oxide and diamagnetic.
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Correct Answer - C
`RbO_2` means `Rb^+` and `O_2^(-)` ion. `O_2^(-)` ion is super oxide ion. It has 17 electrons and is paramagnetic.
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