Question

Magnesium ribbon bums in air and changes to white substance, i.e. magnesium oxide. When magnesium oxide dissolves in water, what type of change take place? Give reason in support of your answer. Express the change in the form of equation. [HOTS]

Answer 1

Answer:

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Mixing of ash obtained by the burning of magnesium with water is a chemical change. When magnesium is burnt in air, it forms magnesium oxide in the form of white ash. When magnesium oxide dissolves in water, it forms a new substance, magnesium hydroxide. So, it is a chemical change.

Answer 2

Mixing of Ash obtained by the burning of magnesium with water is a chemical change . When magnesium is burnt in air , it forms magnesium oxide in the form of a white Ash.......