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