Problem: In which compound is the oxidation state of oxygen not –2?      A) Al2O3      B) Li2O      C) K2O2      D) MgO           E) CO

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In which compound is the oxidation state of oxygen not –2?     

A) Al2O3     

B) Li2O     

C) K2O2     

D) MgO          

E) CO

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