Impurities of lead in silver are removed by:
Correct answer: A. Parke's process
- A. Parke's process
- B. Solvay process
- C. Cyanide process
- D. Amalgamation process
Explanation
The Parke's process is a pyrometallurgical industrial process for removing silver from lead during the production of bullion. It is an example of liquid extraction, hence A. The process takes advantage of two liquid-state properties of zinc. The first is that zinc is immiscible with lead and the other is that silver is 3000 times more soluble in zinc than it is in lead. The Solvay process is used to produce sodium carbonate.
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About Transition Elements
Transition elements are identified by their partially filled d subshells in atoms or common ions. The topic covers the electronic structure of d-block elements, including the filling order of 4s and 3d orbitals, variable oxidation states and the distinction between transition elements and elements with completely filled d subshells.
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