Question

Choose the most appropriate answer from the following list of oxides which fit the description.

[SO₂, SiO₂, Al₂O₃, MgO, CO, Na₂O]

A basic oxide.

Answer 1

Na₂O or MgO

Explanation:

Basic oxides are oxides of metals that react with acids to form salt and water.

From the given list, the metal oxides are Na₂O (Sodium Oxide) and MgO (Magnesium Oxide).

Na₂O (Strongly Basic): Dissolves in water to form NaOH (Sodium Hydroxide), a strong base.

\[\ce{Na2O + H2O -> 2NaOH}\]

MgO (Weakly Basic): Reacts with acids to form salt and water. It is less soluble in water but still basic.

\[\ce{MgO + 2 HCl -> MgCl2 + H2O}\]

Na₂O (Strongly basic) or MgO (Weakly basic).