Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence of
(IIT-JEE, 2008)

Nitrogen

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Oxygen

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Carbon dioxide

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Argon

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Solution

The correct option is B Oxygen
Native silver metal forms a water soluble complex with a dilute aqueous solution of NaCN in the presence of oxygen as follows.
$4 A g + 8 N a C N + 2 H_{2} O + O_{2} \to 4 N a [A g (C N)_{2}] + 4 N a O H$

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native silver metal forms water soluble complex with a dil solution of NaCN in water in the presence of whiach of the following

a) Ar b)CO₂ c) O₂ d) N

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