Haber process produces basic ammonia gas

Steps:

• Recognize neutralization of aqueous solution implies a basic gas reacting with acids to form salts and water.
• Examine gases from each process: acidic gases acidify solutions, while basic ones neutralize.
• Eliminate A, B, and D for producing acidic or inert gases.
• Confirm C yields NH3, which forms a basic solution.

Why C is correct:

• Haber process: N2 + 3H2 ⇌ 2NH3; NH3 + H2O → NH4OH (weak base) neutralizes acids per acid-base reaction definition.

Why the others are wrong:

• A: Forms NOx gases, creating HNO3 (acidic rain).
• B: Produces CO2, forming H2CO3 (carbonic acid).
• D: Yields NO2 (acidic anhydride) and O2 (inert).

Final answer: C