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  • 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.

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The stability of peroxides and superoxides increases as the size of metal ion increases. Stability increases as the size of cation increases.  Peroxide ion and superoxide ion combine with large size of alkali metals.O^{-2}<O_{2}^{-2}<O_{2}^{-} 

 4Li+O_{2}\rightarrow 2Li_{2}O Lithium oxide

  2Na+O_{2}\rightarrow Na_{2}O_{2}Sodium peroxide

 K+O_{2} \rightarrow KO_{2} Superoxide 

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