Chemistry
Grade-9
Easy
Question
When rubidium is reacted with oxygen, the compound formed is:
- RbO
- Rb2O
- Rb2O2
- RbO2
Hint:
Rubidium is group 1 element and oxide generally has -2 charge.
The correct answer is: RbO2
- Rubidium is a group 1 element showing +1 oxidation state.
- When rubidium reacts with oxygen it tarnishes and becomes brown in color.
- Rubidium oxide is formed whose formula is Rb2O.
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