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  • The metal used for extraction of Au & Ag is also used for galvanisation of iron objects. The metal is -Option: 1 Mg <div class

The metal used for extraction of Au & Ag is also used for galvanisation of iron objects. The metal is -

Option: 1

Mg 


Option: 2

Zn 


Option: 3

Cu


Option: 4

Co


Answers (1)

best_answer

Zinc is used as reducing agent for the extraction of Au and Ag. Zinc being a more electropositive metal used for the galvanization of iron to prevent it from rusting.

\mathrm{Zn}(\mathrm{s})+2\left[\mathrm{Au}(\mathrm{CN})_2\right]_{\mathrm{aq}}^{-} \longrightarrow 2 \mathrm{Au}(\mathrm{s})+\left[\mathrm{Zn}(\mathrm{CN})_4\right]_{\mathrm{aq}}^{2-}

Posted by

Divya Prakash Singh

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