Question

Which of the following reactions show the process of smelting?

• A. $2PbO + PbS \rightarrow 3Pb + SO_{2}$
• B. $2Na\lbrack Au(CN)_{2}\rbrack + Zn \rightarrow Na_{2}\lbrack Zn(CN)_{4}\rbrack + 2Au$
• C. $PbO + C \rightarrow Pb + CO$
• D. $2HgS + 3O_{2} \rightarrow 2HgO + 2SO_{2}$

Answer 1

Answer: (C)

$PbO + C \rightarrow Pb + CO$

Answer 2

Smelting is the process of extraction of a metal by reduction of its oxide with carbon (in the form of coke, charcoal or carbon monoxide)