Which one of the following on hydrolysis, gives the corresponding metallic hydroxide, `H_(2)O_(2) and O_(2)` ?

Options

A. `Li_(2)O`
B. `Na_(2)O_(2)`
C. `NaO_(2)`
D. `Na_(2)O`

Answer

C

Explanation

On hydrolysis, alkali metal oxides give the corresponding metallic hydroxides.
`Li_(2)O + H_(2)O rarr 2LiOH`
`Na_(2)O + H_(2)O rarr 2NaOH`
The peroxides of alkali metals give the corresponding metallic hydroxide and `H_(2)O_(2)`.
`Na_(2)O_(2) + 2H_(2)O rarr 2NaOH + H_(2)O_(2)`
Whereas, the superoxides of alkali metals give the corresponding metallic hydroxide, `H_(2)O_(2) and O_(2)`.
`2NaO_(2) + 2H_(2)O rarr 2NaOH + H_(2)O_(2) + O_(2)`
`Be(OH)_(2)` cannot be prepared by hydrolysis of BeO, as it is insoluble in water.