state gov Bihar SSC (BSSC) Inter Level Mock Test 2024 - 25 Chemistry Electrochemistry

The electrolytes usually used in the electroplating of gold and silver, respectively, are

1
[Au(OH)4]- and [Ag(OH)2]-
2
[Au(NH3)2]+ and[Ag(CN)2]-
3
[Au(CN)2]- and [Ag(CN)2]-
4
[Au(CN)2]- and [AgCl2]-
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