Silver can be separated form lead by:

Options

A. fractional crystallisation
B. amalgamation
C. cupellation
D. addition of zinc (Parke's method)

Answer

To solve the question of how silver can be separated from lead, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Process**: The process used to separate silver from lead is known as **cupellation**. This is a refining process specifically designed for noble metals.

**Hint**: Remember that cupellation is a method used for refining metals, particularly noble metals like silver and gold.

2. **Understand the Conditions**: Cupellation involves treating ores at **high temperatures** and under **controlled conditions**. This is crucial for effectively separating the metals.

**Hint**: Think about why high temperatures are necessary for the separation of metals in metallurgy.

3. **Separation Mechanism**: In the presence of oxygen (O2), lead reacts to form **lead oxide**. This reaction is essential because it allows the lead to be separated from the silver, which remains unreacted due to its non-reactive nature.

**Hint**: Consider the reactivity of metals and how certain metals can oxidize while others do not.

4. **Final Outcome**: As a result of the cupellation process, lead is converted to lead oxide, which can be removed, leaving behind pure silver. This is the essence of the cupellation process.

**Hint**: Visualize the final separation: what happens to the lead and what remains as pure silver?

### Summary:
Silver can be separated from lead through the process of **cupellation**, which involves high temperatures and the reaction of lead with oxygen to form lead oxide, allowing for the separation of the two metals.