Question

Which of the following statements are correct in connection with the extraction of silver ?
(This question has multiple correct options )
A.Silver is obtained as a by-product in the extraction of copper , lead and Zinc
B.Silver is obtained from the anode slime formed in the electrolytic refining of Copper and Zinc
C.Zinc is used to extract silver by solvent extraction from molten lead in Parke's process
D.Pattinson's process is used for desilverization of lead

Answer 1

Hint: Silver is often extracted from the ground as a by-product of mining other metals rather than mined as the primary product . So there are various ways in which silver can be obtained .

Complete step by step answer:
During the extraction of copper , zinc and lead many other by-products are also obtained as their ores contain various other metals and silver is one of them .
So , option A is correct .
When electrolytic refining of copper and zinc is done impurities are deposited as anode mud which contain valuable metals , silver is one of the metals .
Hence , option B is also correct .
Parke's process is a method of extracting silver from lead , zinc is used for the extraction as it is immiscible with lead and also silver is more soluble in zinc than it is in lead .
Option C is correct .
Pattinson's process is based on the fact that lead contains the least silver in it and solidifies first on liquefaction , hence it is used for the desilverization of lead .
Hence , option D is also correct
Therefore all the four options are correct .


Note:
Silver can also be extracted by leaching . It is done by treating native silver with dilute solution of sodium or potassium cyanide with air continuously being passed . As a result silver gets oxidised into the soluble complex .