The electrolytes usually used in the electropl... | Metallurgy

Back

JEE MAIN 2019

10-01-2019 S2

Question

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

Select the correct option:

$\left[\mathrm{Au}(\mathrm{CN})_2\right]^{-}$and $\left[\mathrm{AgCl}_2\right]^{-}$

$\left[\mathrm{Au}\left(\mathrm{NH}_3\right)_2\right]^{+}$and $\left[\mathrm{Ag}(\mathrm{CN})_2\right]^{-}$

$\left[\mathrm{Au}(\mathrm{CN})_2\right]^{-}$and $\left[\mathrm{Ag}(\mathrm{CN})_2\right]^{-}$

$\left[\mathrm{Au}(\mathrm{OH})_4\right]^{-}$and $\left[\mathrm{Ag}(\mathrm{OH})_2\right]^{-}$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

$\left[\mathrm{Au}(\mathrm{CN})_2\right]^{-}$and $\left[\mathrm{Ag}(\mathrm{CN})_2\right]^{-}$are used in the electroplating of Au and Ag respectively.

Question Tags

JEE Main

Chemistry

Medium

Start Preparing for JEE with Competishun

Report Issue