Question

How will you prove the nature of metal oxides? [3 MARKS]

Answer 1

Process : 2 Marks
Conclusion : 1 Mark

If we burn a magnesium ribbon, white ash of magnesium oxide is formed. Now by adding little water to white ash we can prepare solution of magnesium oxide. When we dip red litmus paper into this solution it turns blue while when we dip blue litmus paper into this solution colour remains unchanged.
The change in the colour of red litmus to blue indicates the presence of a basic substance. Thus, it proves that metal oxides are basic in nature.