2025 · Paper 1 · Chemistry
Question 12
The printed question, the official key, and each model’s JSON answer plus the reasoning it wrote.
ChemistryPaper 1Numerical
Q12
Official 280
Model answers
Claude Fable 5.1
Anthropic
Correct4 / 4
280
Claude Fable 5.1 reasoning
Nylon 6,6 is made from hexamethylenediamine and adipic acid. The monomer giving a positive carbylamine test (primary aliphatic amine) is hexamethylenediamine, H₂N–(CH₂)₆–NH₂, which contains 2 nitrogen atoms per molecule. In the Dumas method, all nitrogen in the compound is converted to N₂ gas: - 1 mole of X → 2 moles N atoms → 1 mole N₂ - 10 moles of X → 10 moles N₂ Mass of N₂ = 10 × 28 = 280 g
GPT 6 Astra
OpenAI
Correct4 / 4
280
GPT 6 Astra reasoning
No written reasoning was returned for this item.
GPT 5.6 Luna
OpenAI
Correct4 / 4
280
GPT 5.6 Luna reasoning
No written reasoning was returned for this item.