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Complex formed in the following methods ...

Complex formed in the following methods are
(I) Mond's process for purification of nickel
(II) Removal of lead poisoning from the body
(III) Cyanide process for extraction of silver
(IV) Froth flotation process for separation of `ZnS` from galena ore by using depresent.

A

`Ni(CO)_(4)" "[Pb(EDTA)]^(2-)" "[Ag(CN)_(2)]^(-)" "[Zn(CN)_(2)]`

B

`Ni(CO)_(4)" "[Pb(EDTA)]^(2-)" "[Ag(CN)_(2)]^(-)" "[Zn(CN)_(4)]^(2-)`

C

`Ni(CO)_(4)" "[Pb(EDTA)]^(4-)" "[Ag(CN)_(2)]^(-)" "[Zn(CN)_(6)]^(4-)`

D

`Ni(CO)_(4)" "[Pb(EDTA)]^(2-)" "[Ag(CN)_(2)]^(3-)" "[Zn(CN)_(4)]^(2-)`

Text Solution

Verified by Experts

The correct Answer is:
B
`Ni+4CO to Ni(CO_(4))`
`Pb^(2+)+EDTA^(4-) to [Pb(EDTA)]^(2-)`
`Ag+CN^(-)+O_(2) to [Ag(CN)_(2)]^(-)+OH^(-)`
`Zn^(2+)+4CN^(-) to [Zn(CN)_(4)]^(2-)`
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