Chemistry - Complete s-block Question with Solution | TestHub

ChemistryComplete s-blocks-block IAEasy2 minPYQ_2026

ChemistryEasysingle choice

Which element from following forms superoxide with oxygen?

Options:

Answer:

Solution:

Alkali metals react with oxygen to form different types of oxides depending on their size.

Lithium forms mainly monoxide ( $L i_{2} O$ ).

Sodium forms mainly peroxide ( $N a_{2} O_{2}$ ).

Potassium, rubidium, and cesium form mainly superoxides ( $M O_{2}$ ) due to the stabilization of the large superoxide ion by large cations.

Magnesium forms mainly monoxide ( $M g O$ ).

Therefore, potassium forms a superoxide with oxygen.

Answer: Potassium

Stream:MHT_CETSubject:ChemistryTopic:Complete s-blockSubtopic:s-block IA

⏱ 2mℹ️ Source: PYQ_2026

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