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  4. Total number of alkali metals (non-radioactive) which produce superoxide when burn with excess of O2 is .

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Q. Total number of alkali metals (non-radioactive) which produce superoxide when burn with excess of $O_{2}$ is _______ .

NTA AbhyasNTA Abhyas 2022

Solution:

Alkali metals, $K,Rb,Cs$ react with oxygen to form superoxide.
$K+O_{2} \rightarrow \underset{Potassium superoxide}{KO_{2}}$