Cupellation is used for purification of:

• (A) - Pb
• (B) - Ag
• (C) - Zn
• (D) - Fe

Cupellation is a refining process primarily used for the purification of metals. Among the options provided, it is specifically used for the purification of:

Correct Answer

(B) - Ag (Silver)

What is Cupellation?

Cupellation involves heating ores or alloys in a furnace to separate noble metals from impurities. The process is particularly effective for silver, allowing for the removal of lead and other base metals.

Why Not the Others?

• Pb (Lead): Typically extracted through smelting, not cupellation.
• Zn (Zinc): Refined through processes like roasting and electrolysis.
• Fe (Iron): Extracted mainly through blast furnace methods.

In summary, cupellation is most relevant for silver purification, making it the correct choice among the options listed.