Question

i. What do you see when a magnesium ribbon is burnt? Is magnesium oxidised or reduced in this reaction? ii. Define corrosion.

Answer 1

1)magnesium is burnt then it will form magnesium oxide
magnesium is oxidized here

Answer 2

When mgo ribbon burnt in air it burns with a dazzling white flame producing white ash..
Mg +O2 = MgO
It is oxidised
The process of formation of undesirable compound on the surface of the metallic object is called corrosion of metal