Question

When CO is reacted with \( H_2 \) at 573 K, methanol is formed. Which is the catalyst used in this process?

• A. Pd-BaSO₄
• B. Ni-CrO₃
• C. ZnO - Cr₂O₃
• D. Pt-BaSO₄
• E. CuO - Cr₂O₃

Hint:

In the industrial synthesis of methanol, ZnO and Cr₂O₃ are commonly used as catalysts in the hydrogenation of carbon monoxide.

Answer 1

The Correct Option is C

The process of producing methanol from CO and \( H_2 \) is known as the catalytic hydrogenation of carbon monoxide. This process typically uses a catalyst consisting of zinc oxide (ZnO) and chromium oxide (Cr₂O₃). Step 1: Catalytic reaction.
In this reaction, a mixture of carbon monoxide and hydrogen undergoes a reaction in the presence of a catalyst at high pressure and moderate temperature (573 K). The catalyst helps in the formation of methanol: \[ CO + 2H_2 \rightarrow CH_3OH \]
Step 2: Catalyst used.
ZnO - Cr₂O₃ is the typical catalyst used in this reaction. This combination of catalysts helps facilitate the conversion of CO and \( H_2 \) into methanol at the given conditions.
Step 3: Conclusion.
Thus, the correct answer is (C) ZnO - Cr₂O₃, as this is the catalyst used in the production of methanol from CO and \( H_2 \) at 573 K.
Final Answer:} (C) ZnO - Cr₂O₃