of gold and silver, respectively, are:

Question:

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

  1.  $\left[\mathrm{Au}(\mathrm{CN})_{2}\right]^{-}$and $\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}$

  2. $\left[\mathrm{Au}(\mathrm{CN})_{2}\right]^{-}$and $\left[\mathrm{Ag} \mathrm{Cl}_{2}\right]^{-}$

  3. $\left[\mathrm{Au}(\mathrm{OH})_{4}\right]^{-}$and $\left[\mathrm{Ag}(\mathrm{OH})_{2}\right]^{-}$

  4.  $\left[\mathrm{Au}\left(\mathrm{NH}_{3}\right)_{2}\right]^{+}$and $\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}$

Correct Option: 1

Solution:

The electrolytes used in the electroplating of $\mathrm{Au}$ and $\mathrm{Ag}$ are $\left[\mathrm{Au}(\mathrm{CN})_{2}\right]^{-}$and $\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}$respectively.

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