Source: Extra Practice
When a small piece of magnesium ribbon is burnt in air, it forms a white powder called magnesium oxide. What will be the nature of an aqueous solution of this magnesium oxide?
Options
Option A
Acidic
Option B is correct
Basic
Option C
Neutral
Option D
Amphoteric
Explanation
Magnesium is a metal. When metals react with oxygen, they form metal oxides. These metal oxides are generally basic in nature. When magnesium oxide dissolves in water, it forms magnesium hydroxide, which is a base. This solution will turn red litmus paper blue, confirming its basic nature. Acidic solutions are formed by non-metal oxides. Neutral and amphoteric natures are not typical for simple metal oxides at this level. (3 marks = ~75 words)