One of the commercial production methods of methanol is :

Options

A. By reaction of methane and water steam at `900^(@)` in presence of Ni catalyst
B. Induced reduction of carbon monoxide in presence of `ZnO + Cr_(2) O_(3)`
C. By reducing formaldehyde with `LiAIH_(4)`
D. None of these

Answer

To solve the question about the commercial production methods of methanol, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Question**: The question asks for one of the commercial production methods of methanol.

2. **Understand Methanol Production**: Methanol (CH3OH) can be produced through various methods, but we need to focus on the commercial methods.

3. **Review Common Methods**: The common methods for methanol production include:
- Synthesis gas (syngas) method, which involves carbon monoxide (CO) and hydrogen (H2).
- Reduction of methane (not a primary commercial method).
- Other methods that might not be widely used commercially.

4. **Identify the Correct Method**: The most recognized commercial method for producing methanol is the reaction of carbon monoxide with hydrogen gas in the presence of catalysts such as zinc oxide (ZnO) and chromium oxide (Cr2O3).

5. **Conditions for the Reaction**: This reaction typically occurs under high temperature (200-300 °C) and high pressure (around 200-300 atm).

6. **Conclusion**: Based on the above analysis, the correct answer is the method that involves the reaction of carbon monoxide and hydrogen gas under specific conditions to produce methanol.

### Final Answer:
The commercial production method of methanol is the reaction of carbon monoxide (CO) with hydrogen gas (H2) in the presence of ZnO and Cr2O3 at high temperature and pressure.

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