2025 · Paper 1 · Chemistry
Question 8
The printed question, the official key, and each model’s JSON answer plus the reasoning it wrote.
ChemistryPaper 1Numerical
Q08
Official 100
Model answers
Claude Fable 5.1
Anthropic
Correct4 / 4
100
Claude Fable 5.1 reasoning
Cr₂O₇²⁻ + 14H⁺ + 6e⁻ → 2Cr³⁺ + 7H₂O Each Cr goes from +6 to +3, so producing 1 mole of Cr³⁺ requires 3 moles of electrons. Charge required: Q = 3 × 96500 = 289500 C Time: t = 48.25 min = 48.25 × 60 = 2895 s Current: I = Q/t = 289500 / 2895 = 100 A
GPT 6 Astra
OpenAI
Correct4 / 4
100
GPT 6 Astra reasoning
No written reasoning was returned for this item.
GPT 5.6 Luna
OpenAI
Correct4 / 4
100
GPT 5.6 Luna reasoning
No written reasoning was returned for this item.