Question

list the properties of alloys that makes them useful over pure metals? Explain this fact with suitable examples

Answer 1

[1]-to improve strength eg-carbon to iron
[2]-prevent from corrosion 
[3]-change physical properties eg -lead-tin

Answer 2

Here is your answer!
To improve hardness and strength of metals, alloys is used like when carbon is added to iron, its strength and hardness increases.
It is used to improve resistance against corrosion.
It is made to make the metal shine like when nickel and chromium are added to iron, its shine increases.