Question

Difficulty: MediumDrawing Logical Inferences from Passage Premises

Passage:
Recent excavations of Bronze Age slag heaps in Anatolia demonstrate that early metallurgists adapted their smelting furnaces to process complex chalcopyrite ores containing high concentrations of arsenic and antimony. Previous historical models assumed that arsenic-rich copper alloys were produced exclusively through deliberate co-smelting—the intentional addition of separate arsenical minerals to a refined copper melt. However, chemical analysis of slag residues at these Anatolian sites reveals that furnace temperatures were maintained below 1,150 degrees Celsius specifically to prevent the premature volatilization of arsenic already embedded within the raw chalcopyrite ore matrix. By sustaining these moderate thermal conditions, smelters achieved high arsenic retention in the resulting bronze without requiring supplemental mineral additives. Nonetheless, because antimony volatilizes at a significantly lower thermal threshold than arsenic under identical furnace atmospheres, any trace antimony present in the raw ore was entirely lost as vapor during this single-stage process.

Based on the passage premises, evaluate whether the following statement is True or False:
Anatolian metallurgists operating furnaces below 1,150 degrees Celsius would be unable to produce bronze containing antimony from raw chalcopyrite ore using the single-stage smelting process described.

Answer: Answer

Answer

True
The statement is logically true because the passage establishes that antimony volatilizes at a lower thermal threshold than arsenic under identical furnace conditions. Operating the furnace below 1,150 degrees Celsius causes all antimony in raw chalcopyrite ore to escape as vapor, making it impossible to yield antimony-containing bronze through this single-stage process.

Step-by-Step Solution

1
Analyze the thermal conditions and chemical behavior stated in the passage.
Furnace temperatures under 1,150 degrees Celsius prevent arsenic volatilization, but antimony volatilizes at a significantly lower thermal threshold than arsenic.
Comparing the volatilization thresholds of arsenic and antimony reveals how each metal behaves during smelting.
2
Deduce the effect of these thermal conditions on antimony present in raw chalcopyrite ore.
Because antimony's threshold is lower than that of arsenic, any antimony in raw ore vaporizes and escapes entirely during single-stage smelting at these temperatures.
Directly applying the premise proves whether antimony remains in the processed alloy.
3
Determine the validity of the statement based on the deduction.
Smelters cannot produce antimony-bearing bronze from raw ore alone using this single-stage method, confirming the statement as True.
The logical conclusion derived from the premises matches the claim made in the statement.

Key Concept

Drawing Logical Inferences from Passage Premises
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