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

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and

Solution:

Amine complexes of gold are not stable, so, they cannot be used as a solvent.Moreover, in electroplating with silver, silver cyanide is used as electrolyte because the cyanide ion, , reacts with silver ion, to form the complex ion . This produces a silver and more adherent silver plating.

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4. Hybridisation, shape and magnetic moment of is

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5. In the reaction

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[Given that molecular mass of NaOH = 40 g mol]

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for will be-

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A,
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