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Q.

Silver can be precipitated in hydrometallurgy by using aluminium. This is because

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a

silver is more electropositive metal

b

aluminium is more electronegative metal

c

silver is a good oxidising agent

d

aluminium is a good reducing agent

answer is D.

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Detailed Solution

Aluminium is more electropositive than silver. Hence aluminum can be used to precipitate silver from sodium argento cyanide solution.

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