Which of the following metal forms superoxide when reacted with oxygen?
Correct answer: D. Potassium
- A. Beryllium
- B. Lithium
- C. Magnesium
- D. Potassium
Explanation
Potassium reacts with oxygen to form potassium superoxide (KO2 ), especially in an oxygen-rich environment. The larger atomic size and lower ionization energy of potassium favor the formation of the superoxide anion (O2− ), making KO2 relatively stable compared to lighter alkali metals like sodium or lithium, which primarily form peroxides or oxides.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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