Statement-I: In cyanide process for the extraction of gold and silver from their native ores, the cyanide solution acts as a reducing agent to reduce the gold and silver compounds present in the ores into the metallic states.
Statement-2: In the extraction of gold and silver, the cyanide solution acts as complexing reagent in the presence of air and form their respective soluble complexes.

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Statement- 1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1.

Statement- 1 is True, Statement-2 is True, Statement-2 is NOT a correct explanation for Statement-1.

Statement-1 is True, Statement- 2 is False.

Statement-1 is False, Statement-2 is True.

answer is D.

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Detailed Solution

Statement 1 is incorrect. Because it is based on the observation that silver and gold dissolve in a dilute solution of sodium cyanide in the presence of oxygen from the atmosphere, forming complex cyanide.

In the extraction of gold and silver, the cyanide solution acts as complexing reagent in the presence of air and form their respective soluble complexes. because it is evident that when gold and silver are extracted, the cyanide solution functions as a complexing agent, forming the appropriate solubility complexes in the presence of air.

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