Question

Why do we rub magnesium ribbon with sandpaper?

Answer 1

Step-by-step explanation:

like rusting in case of iron with magnesium oxide layer form a white coating on the outside of the metal that will slow down or interfere with the burning process. Rubbing with Sandpaper help to remove this oxide layer due to which burning speeds up.

Answer 2

Like rusting in case of iron, with magnesium, the oxide layer forms a white coating on the outside of the metal that will slow down or interfere with the burning process. Rubbing with sand paper helps to remove this oxide layer due to which burning speeds up.