When items of jewellery made of metals such as copper or nickel are placed in a solution having a salt of gold, a thin film of gold is deposited by?
A. heating above 100 degree Centigrade B. passing an electric current C. just keeping it for 10 minutes D. cooling to below 0 degree Centigrade
Answers
Answered by
0
Heya,
The answer to your question is :
A. by heating above 100 degree Celsius.
Regards,
Kshitij.
Similar questions