Name the form of polyester which is replacing materials like glass and used for making bottles and jars.
Name two metals which are used: (a) for making electric wires. (b) for making domestic utensils and factory equipment. (c) for making jewellery and to decrate sweets.
Which property of copper and aluminium makes them suitable: (a) for making cooking utensils and boilers? (b) for making electric wires?