The reaction of , water gas `(CO+H_2)+H_2` at 673 K, 300 atmosphere in presence of the catalyst `Cr_3O_3//ZnO` is used for the manufacture of

Options

A. `CH_3OH`
B. HCOOH
C. HCHO
D. `CH_3COOH`

Answer

To solve the question regarding the reaction of water gas (CO + H₂) in the presence of a catalyst (Cr₂O₃/ZnO) at specific conditions, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants and Conditions**:
- The reactants are water gas, which consists of carbon monoxide (CO) and hydrogen gas (H₂).
- The reaction takes place at a temperature of 673 K and a pressure of 300 atmospheres.

2. **Understand the Role of the Catalyst**:
- The catalyst mentioned is a combination of chromium(III) oxide (Cr₂O₃) and zinc oxide (ZnO). This catalyst is commonly used in the synthesis of methanol from CO and H₂.

3. **Write the Reaction Equation**:
- The balanced chemical reaction for the synthesis of methanol (CH₃OH) from CO and H₂ can be written as:
\[ CO + 2H_2 \xrightarrow{Cr_2O_3/ZnO} CH_3OH \]
- Note that 2 moles of hydrogen are required for every mole of carbon monoxide.

4. **Conclusion**:
- The product of the reaction under the given conditions (673 K and 300 atm) with the catalyst is methanol (CH₃OH).
- Therefore, the correct answer to the question is that this reaction is used for the manufacture of methanol.

### Final Answer:
The reaction of water gas (CO + H₂) at 673 K and 300 atm in the presence of the catalyst Cr₂O₃/ZnO is used for the manufacture of **methanol (CH₃OH)**.

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