a How does the painting of an iron object prevent its rusting b How does the electrical conductivity...

Question

a How does the painting of an iron object prevent its rusting b How does the electrical conductivity of copper alloys brass and bronze differ from that of pure copper c What is meant by 22 carat gold Name the metals which are usually alloyed with gold to make it harder

Accepted Answer

a When the paint is applied on a surface of an iron article it prevents air and moisture to come in contact with the object and thus prevents rusting b The copper alloys like brass and bronze are poor conductors of electricity Copper is a good conductor of electricity and hence is used as electrical wires c 22carat gold is 22 parts of pure gold alloyed with 2 parts of either silver or copper for making ornaments As gold is a very soft metal Silver and copper are usually alloyed with gold to make it harder

Lakhmir Singh Solutions Class 10 Chemistry Solutions for Exercise in Chapter 3 - Chapter 3 Metals and Non Metals