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Native silver metel froms a water solube...

Native silver metel froms a water solube, complex with a dilute aqueous solution of `NaCN` in the presence of

A

nitrogen

B

oxygen

C

carbon dioxide

D

argon

Text Solution

Verified by Experts

The correct Answer is:
B
Ag dissociates in a solution of NaCN in the presence of air, and forms sodium argentocyanide.
`4Ag + 8NaCN + 2 H_(2)O + O_(2) rarr 4Na [Ag(CN)_(2)] + 4NaOH`
Hence, (B) is the correct answer.
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