Question: The electrolytes usually used in the electroplating of gold and silver, respectively, are :
$\left[\mathrm{Au}(\mathrm{OH})_{4}\right]^{-}$and $\left[\mathrm{Ag}(\mathrm{OH})_{2}\right]^{-}$
$\left[\mathrm{Au}(\mathrm{CN})_{2}\right]^{-}$and $[\mathrm{Ag} \mathrm{CI}]^{-}$
$\left[\mathrm{Au}\left(\mathrm{NH}_{3}\right)_{2}\right]^{+}$and $\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}$
$\left[\mathrm{Au}(\mathrm{CN})_{2}\right]^{-}$and $\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}$
Correct Option: , 4
Solution:
$\left[\mathrm{Au}(\mathrm{CN})_{2}\right]^{-}$and $\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]^{-}$
