Question

i) Rusting of iron is a chemical change and requires oxygen and _________.​

Answer 1

answer:

water

explanation:

Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur.

Answer 2

Answer:

Rusting of iron is a chemical change and requires oxygen and moisture (water).