Concept:The industrial production of methanol from syngas (a mixture of CO and \(\text{H}_2\)) requires specific high-pressure thermodynamics and a specialized transition-metal oxide catalyst to lower the activation energy.
Formula:$$ \text{CO} + 2\text{H}_2 \xrightarrow[400^{\circ}\text{C, 200 atm}]{\text{ZnO/Cr}_2\text{O}_3} \text{CH}_3\text{OH} $$
Solution:- The standard catalytic mixture utilized historically and conceptually in this curriculum is zinc oxide (\(\text{ZnO}\)) promoted by chromium(III) oxide (\(\text{Cr}_2\text{O}_3\)).
Why other options are incorrect:While modern industrial processes might use copper/zinc/alumina systems, within the strict boundaries of this historical past-paper curriculum, the \(\text{ZnO} - \text{Cr}_2\text{O}_3\) pairing is the exclusive correct answer.
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