Question

pure forms of iron and gold are not used as they are not durable give reason

Answer 1

Pure form of iron is used for making pipes .

Pure form of gold is not used because it is very soft . To increase its tensile strength , copper is mixed with it.

Answer 2

Pure form of gold cannot be used because they are very soft in nature and to increase their strength, you need to add copper.

On the other part, pure form of iron is also soft and you cannot use them as durable element.

But for fabrication, people can use pure form of iron and they are used for making pipes and other construction objects.