2025 · Paper 1 · Chemistry
Question 1
The printed question, the official key, and each model’s JSON answer plus the reasoning it wrote.
ChemistryPaper 1Single correct
Q01
Official A
Model answers
Claude Fable 5.1
Anthropic
Correct3 / 3
A
Claude Fable 5.1 reasoning
NH₄NO₂ on gentle heating decomposes to N₂ and water: NH₄NO₂ → N₂ + 2H₂O (X = N₂). NH₄NO₃ on heating at 200–250 °C gives nitrous oxide: NH₄NO₃ → N₂O + 2H₂O (Y = N₂O). So X = N₂ and Y = N₂O, which is option (A).
GPT 6 Astra
OpenAI
Correct3 / 3
A
GPT 6 Astra reasoning
No written reasoning was returned for this item.
GPT 5.6 Luna
OpenAI
Correct3 / 3
A
GPT 5.6 Luna reasoning
No written reasoning was returned for this item.