Question:
In the metallurgy of zinc, the reducing agent employed in reducing the zinc oxide to crude zinc metal in the last stage is
In the metallurgy of zinc, the reducing agent employed in reducing the zinc oxide to crude zinc metal in the last stage is
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Most metal oxides are reduced using carbon or CO in metallurgy.
Updated On: May 8, 2026
- Al
- Li
- Coke
- Water gas
- H$_2$ gas
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The Correct Option is C
Solution and Explanation
Concept:
In zinc metallurgy, zinc oxide is reduced to metallic zinc by carbon (coke) at high temperature. This is a classic example of reduction by carbon.
Step 1: Identify the stage.
Final stage: \[ ZnO + C \rightarrow Zn + CO \]
Step 2: Reasoning.
Carbon acts as reducing agent because:
• It removes oxygen from ZnO
• It itself gets oxidized to CO
Step 3: Eliminate other options.
Al, Li → too reactive not used industrially
Water gas, H$_2$ → not used here
Step 4: Final answer. \[ \boxed{\text{Coke}} \]
Step 1: Identify the stage.
Final stage: \[ ZnO + C \rightarrow Zn + CO \]
Step 2: Reasoning.
Carbon acts as reducing agent because:
• It removes oxygen from ZnO
• It itself gets oxidized to CO
Step 3: Eliminate other options.
Al, Li → too reactive not used industrially
Water gas, H$_2$ → not used here
Step 4: Final answer. \[ \boxed{\text{Coke}} \]
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