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Which of the following metals is obtaine...

Which of the following metals is obtained by leaching out process using a solution of `NaCN` and then precipitating the metal by addition of zinc dust?

A

Copper

B

Silver

C

Nickel

D

Iron

Text Solution

Verified by Experts

The correct Answer is:
B
`Ag_2S + 4NaCN to 2Na[Ag (CN)_2] + Na_2S`
`2Na[Ag (CN)_2] + Zn to Na_2 [Zn(CN)_4] + 2Ag`.
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