CIE iGCSE Co-Ordinated Science C9.5 Corrosion of metals Exam Style Questions Paper 1
Question
Which substances are needed for iron to rust?
(A) oxygen and water
(B) nitrogen and water
(C) oxygen only
(D) water only
▶️Answer/Explanation
Ans: A
Question
Which substances are needed for iron to rust?
(A) oxygen and water
(B) nitrogen and water
(C) oxygen only
(D) water only
Ans: A