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Gold is extracted by hydrometallurgical ...

Gold is extracted by hydrometallurgical procees based on its property

A

of bing electropositive

B

of being less reactive

C

to form complexes which are water soluble

D

to form salts which are water soluble

Text Solution

Verified by Experts

The correct Answer is:
C
Hydrometallurgy is the process of dissilving the metal or its ore by the action of a suitable chemicla regent followed by recovery of the metal either by electroysis or by the use of a suitable precipitating agent.
`4Au+8KCN+2H_(0)+underset(air)(O_(2))rarr`
`4K[Au(CN)_(2)]+4KOH`
`2K[Au(CN)_(2)]+Znrarr2Au +K_(2)[Zn(CN)_(4)]`
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