Chemistry
Grade-9
Easy
Question
The formula of copper(II) oxide is:
- CuO
- Cu2O
- CuO
- Cu2O2
Hint:
Copper is present in +2 oxidation state.
The correct answer is: CuO
- When a metal can have multiple oxidation states, the particular oxidation state in which it exists in that compound in mentioned in binary in the bracket.
- In the formula in binary the oxidation state of the metal is mentioned.
- The copper is present in +2 oxidation state and the oxide is present in -2. Each copper and oxygen is present in one unit each.
- The chemical formula of copper(II) oxide is CuO.
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