defined as those metals that contain iron while non-ferrous metals do not.\ i. Differentiate between iron and steel and give example of application for both materials.\ [4 Marks]\ [CLO3, PL04, C3]\ ii. Stainless steel is commonly used as kitchen utensil and medical tools. Explain why stainless is choose for those application\ [3 Marks]\ [CLO3, PLO4, C3]\ iii. Briefly describe distinctive features, limitations and applications of the titanium alloys and refractory metals.\ [3 Marks]\ [CLO3, PLO4, C2]\ (b) Polymer are materials made of long, repeating chain of molecules. The materials have unique properties depending on the type of molecules being bonded.\ i. Using appropriate schematic diagrams, briefly describe THREE (3) types of polymer molecular structure.\ [3 Marks]\ [CLO3, PL04, C1]\ ii. In your opinion, what is the disadvantage of polymer.\ [3 Marks]

defined as those metals that contain iron while non-ferrous metals do not. i. Differentiate between iron and steel and give example of application for both materials. [4 Marks] [CLO3, PL04, C3] ii. Stainless steel is commonly used as kitchen utensil and medical tools. Explain why stainless is choose for those application [3 Marks] [CLO3, PLO4, C3] iii. Briefly describe distinctive features, limitations and applications of the titanium alloys and refractory metals. [3 Marks] [CLO3, PLO4, C2] (b) Polymer are materials made of long, repeating chain of molecules. The materials have unique properties depending on the type of molecules being bonded. i. Using appropriate schematic diagrams, briefly describe THREE (3) types of polymer molecular structure. [3 Marks] [CLO3, PLO4, C1] ii. In your opinion, what is the disadvantage of polymer. [3 Marks]