Question

Match the following:

• A. A-III, B-IV, C-I, D-II
• B. A-I, B-II, C-III, D-IV
• C. A-II, B-IV, C-I, D-III
• D. A-III, B-II, C-IV, D-I

Hint:

Higher reduction efficiency → lower FeO content in product.

Answer 1

The Correct Option is B

Concept: FeO content varies depending on reduction efficiency: - Blast furnace slag retains more FeO - Gas-based DR is more efficient - Coal-based DR has intermediate reduction - DRI is product with lowest oxygen content

Step 1: Blast furnace slag.
Contains highest FeO due to incomplete reduction: \[ A \rightarrow I \]

Step 2: DRI.
Highly reduced iron: \[ B \rightarrow II \]

Step 3: Gas-based DR.
Most efficient reduction → lowest FeO: \[ C \rightarrow III \]

Step 4: Coal-based DR.
Less efficient than gas-based: \[ D \rightarrow IV \] Final Answer: \[ \boxed{A-I,\; B-II,\; C-III,\; D-IV} \]