Contact Process Conditions for Sulfuric Acid Production Steps:

• Recall the Contact process converts SO₂ to SO₃ via 2SO₂ + O₂ ⇌ 2SO₃, requiring a catalyst and specific temperature/pressure for optimal yield.
• Identify the catalyst as V₂O₅, which lowers activation energy without being poisoned by impurities.
• Note temperature around 450°C balances reaction rate and equilibrium (exothermic, so moderate heat favors forward reaction).
• Confirm pressure at 2 atm, slightly above atmospheric to improve rate without high cost, unlike high-pressure processes.

Why C is correct:

• Matches standard conditions: 450°C for rate-equilibrium balance, 2 atm for efficiency, V₂O₅ as the vanadium(V) oxide catalyst in the Contact process.

Why the others are wrong:

• A: Temperature too low (100°C slows rate); pressure excessive (200 atm unnecessary); V₂O₅ correct but conditions mismatch.
• B: Catalyst Fe used in Haber process, not Contact; temperature/pressure for ammonia synthesis.
• D: Conditions match temperature/pressure but Fe₂O₃ is iron(III) oxide, incorrect catalyst (V₂O₅ required).

Final answer: C