1. Take magnesium oxide in a test S tube. Add water in the test-tube. Shake the test-tube. Test the solution with red and blue litmus paper. Blue litmus paper remains as it is while red litmus paper turns blue. This shows that metal oxides are basic in nature.
2. Metal oxides react with an acid to form salt and water. Therefore, metal oxides are basic in nature. Metal oxide + Acid → + Water
