Which of the following dissovles in water to produce hydroxides?

Options

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

Answer

D

Explanation

All the alkali metals, their oxides, peroxides, and superoxides readily dissolve in water to produce the corresponding hydroxides which are strong alkalies:
`2Na+2H_(2)Orarr2NaOH+H_(2)`
`Na_(2)Orarr2NaOH`
`Na_(2)O_(2)+2H_(2)Orarr2NaOH+H_(2)O_(2)`
`2NaO_(2)+2H_(2)Orarr2NaOH+H_(2)O_(2)+O_(2)`
The last three reactions corresponed to the hydrolysis of oxides, peroxides, and superoxides, respectively.