MCQ
The catalyst used in preparation of oxygen from hydrogen peroxide is:
- ✓Manganese dioxide.
- BAgnesium oxide.
- CManganese oxide.
- DManganese sulphate.
✓
Answer
Correct option: A.
Manganese dioxide.
Manganese dioxide lowers the activation energy which makes the reaction of decomposition of hydrogen peroxide to oxygen fast. It allows more molecules of $H_2O_2$ to undergo decomposition in a shorter period of time.
Balanced chemical equation of reaction is:
$2\text{H}_2\text{O}_2(\text{aq})\rightarrow{\text{MnO}_2(\text{s})}2\text{H}_2\text{O(l)+O}_2(\text{g})$
Balanced chemical equation of reaction is:
$2\text{H}_2\text{O}_2(\text{aq})\rightarrow{\text{MnO}_2(\text{s})}2\text{H}_2\text{O(l)+O}_2(\text{g})$
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