Dihydrogen reacts with CO at 700 K in the presence of a catalyst to form methanol, the catalyst is

Options

A. `Zn O. C_2 O_3`
B. `ZnO. C_2 O_4`
C. `ZnO. CrO`
D. `ZnO. Cr_2 O_3`

Explanation

To determine the catalyst used in the reaction of dihydrogen (H₂) with carbon monoxide (CO) to form methanol (CH₃OH) at 700 K, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reaction**: The reaction we are considering is:
\[ \text{CO} + 2\text{H}_2 \rightarrow \text{CH}_3\text{OH} \]
This reaction is known as the synthesis of methanol from carbon monoxide and dihydrogen.

2. **Conditions of the Reaction**: The reaction occurs at a temperature of 700 K and under high pressure (approximately 300 atm). These conditions are typically used to favor the formation of methanol.

3. **Identify the Catalyst**: In industrial processes, specific catalysts are used to facilitate the reaction between CO and H₂. The common catalysts for this reaction are mixtures of metal oxides.

4. **Common Catalysts**: The catalysts often used in the methanol synthesis reaction include:
- Zinc oxide (ZnO)
- Chromium oxide (Cr₂O₃)

5. **Conclusion**: Therefore, the catalyst used in the reaction of dihydrogen with carbon monoxide to form methanol at 700 K is a mixture of zinc oxide and chromium oxide:
\[ \text{Catalyst: ZnO and Cr}_2\text{O}_3 \]

### Final Answer:
The catalyst used in the reaction is a mixture of Zinc Oxide (ZnO) and Chromium Oxide (Cr₂O₃).

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