1.

Which of the following oxides is formed on burning sodium in oxygen ?

Answer»

`Na_(2)O`
`Na_(2)O_(2)`
`NaO(2)`
NaO.

Solution :Formation of oxides, peroxides and superoxides depend on the SIZE of alkali METAL. An atom with larger size produces super OXIDE. Li FORMS oxide, Na forms peroxide whereasK forms superoxide.


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