For goldplating on a copper chain, the substance required in the form

1.	For goldplating on a copper chain, the substance required in the form of solution is
A.	Copper sulphate
B.	Copper chloride
C.	2000 W
D.	Potassium aurocyanide
Answer» E.

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For goldplating on a copper chain, the substance required in the form of solution is

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