Chemistry NMDCAT MCQs Limiting and Excess Reactants

nmdcat.online July 2, 2026

In the complete combustion of 3 moles of carbon with 2 moles of oxygen (C + O₂ → CO₂), the limiting reactant and the maximum moles of CO₂ formed are

A. C is limiting; 2 moles CO₂

B. O₂ is limiting; 2 moles CO₂

✓

C. C is limiting; 3 moles CO₂

D. O₂ is limiting; 3 moles CO₂

📝 Explanation

The reaction is 1:1. Two moles of O₂ produce only 2 moles of CO₂.

📖 Additional Information

C is limiting; 2 moles CO₂
O₂ is limiting; 2 moles CO₂
C is limiting; 3 moles CO₂
O₂ is limiting; 3 moles CO₂

The reaction is 1:1. Two moles of O₂ produce only 2 moles of CO₂.

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