The stability of peroxide and superoxide of alkali metals increase as we go down the group. Explain giving reason.????
The stability of peroxide and superoxide of alkali metals increase as we go down the group. Explain giving reason.????
This is a long answer type question as classified in NCERT Exemplar
As the size of metal ions increases, the stability of peroxides and superoxides increases. Peroxide and superoxide ions combine with a large size of alkali metals. Lithium forms monoxide, sodium forms peroxide and potassium, rubidium
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Li+ has the highest hydration enthalpy.
Hence it is most hydrated
Therefore, Correct order of hydrated radii is Cs+ < Rb+ < K+ < Na+ < Li+
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Chemistry NCERT Exemplar Solutions Class 11th Chapter Ten 2025
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