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Preparations and Uses of Caustic Soda

Hydro metallu...

Question

Hydro metallurgy method is used for the extraction of the following metals.

Z n

and

A g

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A g

and

A u

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Z n

and

H g

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H g

and

C u

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Solution

The correct option is B $A g$ and $A u$
Hydro metallurgy or Precipitation by more electropositive metal.
It is the process in which more electropositive metal displaces less electropositive metal from its aqueous solution state.
$A g$ and $A u$ are reduced by hydro metallergical process.

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