Question

Which metal/non-metal is used as a reducing agent in smelting?

• A. $C$
• B. $Al$
• C. $Zn$
• D. None of these

Answer 1

The correct option is D None of these

Reduction is the final high-temperature step in smelting. In this, the oxide becomes the elemental metal. Smelting uses heat and a chemical reducing agent to change the oxidation state of the metal ore. The reducing agent is commonly a source of carbon such as coke. So, we use $CO$ as a reducing agent in smelting process.