Question

Oxides of most metals combine with water to form what?

Answer 1

Hydroxides of that metal.

Explanation:

Oxides of metals combine with water to form hydroxides of the metal.

For example,
`Na_2O` + `H_2O` ------> `2NaOH`.
`MgO` + `H_2O` ------> `Mg(OH)_2`.
`Al_2O_3` + `3H_2O` ------> `2Al(OH)_3`.