Question

which of the following oxides react(s) with water to give oxoacids)? a. co, b. co2, c. cao, d. mgo, e. all of the above

Answer 1

the answer is option "d".

Because their oxide ions (O2-) become hydroxide ions, the oxides of Na and Mg with solely ionic bonding create alkaline solutions with water (OH-)

O2- (aq) + H2O (l) → 2OH- (aq)

magnesium oxide, MgO, are made up of ions