Hydrogen gas is not produced commercially (for nitrogenous fertiliser manufacture) by _____________________?
Correct answer: A. Iron-steam reaction
- A. Iron-steam reaction
- B. Electrolysis of water
- C. Steam reforming of naphtha
- D. Its cryogenic separation from coke oven gas
Explanation
The iron-steam reaction is mainly an older laboratory or limited-process route and is not a normal commercial source of hydrogen for ammonia manufacture. Commercial routes include water electrolysis, hydrocarbon steam reforming, and recovery from coke-oven gas.
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