In cyanidation of gold and silver the formation of HCN is prevented by – InterviewSolution

1.	In cyanidation of gold and silver the formation of HCN is prevented by addition of ........
Answer» `H_2SO_4` `NaCN` `NaOH` `Pb(NO_3)_2` SOLUTION :At a low pH, the NaCN or KCN produces a toxic GAS HCN. Thus, MEDIUM of REACTION is maintained alkaline to prevent FORMATION of HCN `H^(+) + NaCN to HCN + Na^(+)`

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