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InterviewSolution
| 1. |
The electrolytic bath used in gold plating of copper articles, contains : (a) KCN + AuCl3 (b) CuSO4 (c) AuCl3 (d) molten gold |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (a) KCN + AuCl<sub>3</sub></strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">KCN and AuCl<sub>3</sub> combine together forming a complex salt K[Au(CN)<sub>4</sub>]. This complex salt releases gold slowly giving co-herent gold film on the article to be gold plated.</span></span></p> | |