Answer the following questions in short:
1. Why are stainless steel, copper and aluminium used for making cooking utensils
-2. Why are gold and silver used for making thin foils or thin sheets?
3. Why are aluminium and copper used for making electrical wires?
4. What happens to the iron objects when they are kept in moist air for a long time?
Answers
Answer:
1. Aluminum, copper and many more metal are good conductor of heat which allow the metals to be used as utensils. ... Utensils of different shapes can be obtained easily due to their property of deformation without losing toughness. They are also good conductor of heat.
2. The property which allow the metals to be hammered into thin sheets is called malleability. Gold and silver are the best malleable metals. ... It is due to the property of malleability that metals can be bent to form objects of different shapes by beating with a hammer.
3.Copper and aluminium are most frequently used as the electrical conductors in electrical cables due to their low resistance and excellent conductivity. These metals are both ductile and relatively resistant to corrosion, but they also have different properties which make them useful for various applications.
4.Corrosion occurs in the presence of moisture. For example, when an iron is exposed to moist air, it reacts with oxygen to form rust(Fe2O3 . ... Corrosion can also happen when metals like steel are placed under too much stress causing the material to crack.
Hope it helps !!