Question

why magnesium ribbon rubbed before burning ? ​

Answer 1

Answer:

Magnesium ribbon should be cleaned with sandpaper before burning in the air. It should be cleaned before burning due to the following reasons: Magnesium very reactive element which rapidly reacts with oxygen in the air to form a white layer of magnesium oxide and this layer will not burn.

Answer 2

Answer:

Magnesium ribbon should be cleaned with sandpaper before burning in the air. It should be cleaned before burning due to the following reasons: Magnesium very reactive element which rapidly reacts with oxygen in the air to form a white layer of magnesium oxide and this layer will not burn.