Question

why is copper mixed with gold and silver for making its ornament

Answer 1

Answer:

therefore, it is not suitable for making ornament. but when is allowed with copper and silver, the gold become harder and stronger.

Answer 2

Answer:

pure gold is soft and can easily change its shape with a little force therefore it is not suitable for making ornaments but when it is alloyed with copper the gold become harder and stronger and it's brittleness decreases thus alloy of copper and gold is suitable for making ornaments.