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Native silver metel froms a water solube...

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

A

Nitrogen

B

Oxygen

C

Carbon dioxide

D

Argon

Text Solution

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The correct Answer is:
To solve the question regarding the formation of a water-soluble complex with native silver metal using a dilute aqueous solution of NaCN, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Reaction**: - Native silver (Ag) can react with sodium cyanide (NaCN) in the presence of oxygen and water. This reaction leads to the formation of a soluble complex. 2. **Writing the Reaction**: - When silver reacts with NaCN in the presence of oxygen and water, the following reaction occurs: \[ 4 \text{Ag} + 8 \text{NaCN} + \text{O}_2 + 2 \text{H}_2\text{O} \rightarrow 4 \text{Na[Ag(CN)}_2] + 4 \text{NaOH} \] - Here, the complex formed is sodium dicyanoargentate(I), represented as Na[Ag(CN)₂]. 3. **Identifying the Role of Oxygen**: - Oxygen is crucial in this reaction as it helps in the oxidation of silver, allowing it to form the soluble complex with cyanide ions. 4. **Conclusion**: - Therefore, the presence of oxygen is essential for the formation of the water-soluble complex with native silver metal when treated with a dilute aqueous solution of NaCN. 5. **Final Answer**: - The correct answer to the question is **Oxygen**.
To solve the question regarding the formation of a water-soluble complex with native silver metal using a dilute aqueous solution of NaCN, we can follow these steps: ### Step-by-Step Solution: 1. **Understanding the Reaction**: - Native silver (Ag) can react with sodium cyanide (NaCN) in the presence of oxygen and water. This reaction leads to the formation of a soluble complex. 2. **Writing the Reaction**: ...
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