Question

Why magnesium ribbons rubbed before use ?​

Answer 1

Hey mate! Here is your answer:

Magnesium ribbon must be cleaned before burning in air so that the layer of magnesium oxide (which is formed due to reaction of magnesium with air) can be removed in order to get the desired chemical reaction.

Hope it helps you ✌

Answer 2

Answer:

hyy thankx dear

to say nice :)