2025 · Paper 1 · Chemistry
Question 3
The printed question, the official key, and each model’s JSON answer plus the reasoning it wrote.
ChemistryPaper 1Single correct
Q03
Official B
Model answers
Claude Fable 5.1
Anthropic
Correct3 / 3
B
Claude Fable 5.1 reasoning
In neutral (or faintly alkaline) aqueous medium, permanganate oxidises iodide to iodate, while MnO₄⁻ is reduced to MnO₂: 2MnO₄⁻ + H₂O + I⁻ → 2MnO₂ + 2OH⁻ + IO₃⁻ This is the standard NCERT reaction (in acidic medium, I⁻ would be oxidised only to I₂). Hence the product is IO₃⁻.
GPT 6 Astra
OpenAI
Correct3 / 3
B
GPT 6 Astra reasoning
No written reasoning was returned for this item.
GPT 5.6 Luna
OpenAI
Correct3 / 3
B
GPT 5.6 Luna reasoning
No written reasoning was returned for this item.