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Lead obtained from galena ore (PbS) by a...

Lead obtained from galena ore `(PbS)` by air reduction or carbon reduction process contains base metal `(cu, Bi, As, Sn,Zn)` as impurities.
The removal of the impurity of `Ag` from the commercial lead is called.

A

Desilverization of lead

B

Softening process

C

Bett's electrolysis

D

Cupellation

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The correct Answer is:
To solve the question regarding the removal of silver impurity from commercial lead obtained from galena ore, we can follow these steps: ### Step-by-Step Solution: 1. **Identify the Ore and Impurities**: - The ore in question is galena, which is primarily composed of lead sulfide (PbS). - The impurities present in the lead obtained from galena include base metals such as copper (Cu), bismuth (Bi), arsenic (As), tin (Sn), zinc (Zn), and silver (Ag). 2. **Understand the Process for Removing Silver**: - The specific process used to remove silver from lead is known as the Parkes process. This process is specifically designed for the desilverization of lead. 3. **Explain the Parkes Process**: - In the Parkes process, molten lead is mixed with zinc. Silver is more soluble in molten zinc than in lead. - When the mixture is allowed to settle, the zinc, along with the dissolved silver, forms a separate layer that can be removed, leaving behind purer lead. 4. **Conclude the Answer**: - The removal of silver from commercial lead is referred to as "desilverization of lead," which is achieved through the Parkes process. ### Final Answer: The removal of the impurity of silver from commercial lead is called **desilverization of lead**. ---
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