Question

why do we rub magnesium ribbon with sand paper before burning it....!?​

Answer 1

Answer:

Magnesium ribbon should be cleaned with sandpaper before burning in the air because of 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

Question:-

why do we rub magnesium ribbon with sand paper before burning it?

Answer:-

Magnesium metal is reactive in nature, it forms a layer of magnesium oxide on its surface due to corrosion, hence to remove the impurities present on its surface we clean it with sand paper.

hope it helps u...!!