Question:
Identify the element forming peroxide on reaction with oxygen.
Identify the element forming peroxide on reaction with oxygen.
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Among the options only an alkali metal forms a peroxide when burnt in oxygen.
Updated On: Nov 13, 2026
- C
- Ar
- Na
- He
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Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
Alkali metals react with oxygen to give oxides, peroxides or superoxides depending on size.
Step 2: Check the Options
Carbon forms oxides of carbon.
Argon and helium are noble gases and do not react with oxygen.
Sodium burns in excess oxygen to give a peroxide.
Step 3: Reaction
\(2\text{Na} + \text{O}_2 \rightarrow \text{Na}_2\text{O}_2\)
Final Answer:
Sodium forms the peroxide. \[ \boxed{\text{(C) }\text{Na}} \]
Alkali metals react with oxygen to give oxides, peroxides or superoxides depending on size.
Step 2: Check the Options
Carbon forms oxides of carbon.
Argon and helium are noble gases and do not react with oxygen.
Sodium burns in excess oxygen to give a peroxide.
Step 3: Reaction
\(2\text{Na} + \text{O}_2 \rightarrow \text{Na}_2\text{O}_2\)
Final Answer:
Sodium forms the peroxide. \[ \boxed{\text{(C) }\text{Na}} \]
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