Give reasons for the following observations:
Lyophilic sol is more stable than a lyophobic sol.
Which reducing agent is employed to get copper from the leached low-grade copper ore?
Outline the principles behind the refining of metals by the following methods:
Zone refining method
Outline the principles behind the refining of metals by the following methods:
Chromatographic method
Name the method used for the refining of Nickel metal?
Nickel is refined by mond’s process .In this process, nickel is heated in the presence of carbon monoxide to form nickel tetracarbonyl, which is a volatile complex.
Then, the obtained nickel tetracarbonyl is decomposed by subjecting it to a higher temperature (450-470) to obtain nickel metal.
Which solution is used for the leaching of silver metal in the presence of air in the metallurgy of silver?