Question

# Native silver metal forms a water soluble complex with a dilute aqueous solution of $$NaCN$$ in the presence of:

A
nitrogen
B
oxygen
C
carbon dioxide
D
argon

Solution

## The correct option is B oxygen$$Ag$$ reacts in a solution of $$NaCN$$ in the presence of air and forms sodium argentocyanide.$$4Ag+8NaCN+2H_{2}O+O_{2} \to 4Na[Ag(CN)_{2}]+4NaOH$$Chemistry

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