Name the reagent that is used in leachi...

Name the reagent that is used in leaching of gold .

A

Carbon

B

Sodium cyanide

C

Carbon monoxide

D

Iodine

Verified by Experts

The correct Answer is:

B

Sodium cyanide
`4Au + 8NaCN + 2H_2O + O_2 to 4Na[Au(CN)_2] + 4NaOH`

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