Which of the following is not added duri...

Which of the following is not added during the extraction of silver by cyanide process?

A

NaCN

B

Air

C

Zn

D

`Na_2S_2O_3`

Verified by Experts

The correct Answer is:

C

`Ag_(2)S+4NaCNhArr 2Na[Ag(CN)(2)]+Na(2)S`
`Na_2S+2O_2rarrNa_2SO_4`
`2Na[Ag(CN)_2]+2nrarrNa[Zn(CN)_4]+2Ag`

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