Question

Extraction of gold and silver involves leaching with CN⁻ion.
Silver is later recovered by [2017]
(a) distillation (b) zone refining
(c) displacement with Zn (d) liquation

Answer 1

Explanation:

Extraction of gold and silver involves leaching with CN⁻ion.

Silver is later recovered by [2017]

(a) distillation

(b) zone refining

(c) displacement with Zn

(d) liquation

Answer 2

Gold and silverIs extracted involving leaching with cyanide Ion. Silver is later recovered by displacement with zinc.

Option: (c)

Explanation:

• The displacement of one metal with other is on the basis of the metal reactivity.

• The metal reactivity is dependent on the metal series. In this series zinc is higher than silver on the metal recovery series. Hence zinc displaces silver and the pure silver is formed.

• This is used in the laboratory preparation of noble metals like gold and silver.

To know more about metal displacement series,

what is the reactivity series of mrtals? explain displacement reaction ...

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