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Chemistry NMDCAT MCQs Limiting and Excess Reactants
nmdcat.online July 2, 2026

48. A mixture of 14 g of N₂ and 8 g of H₂ is used for NH₃ synthesis. After the reaction, the mass of excess reactant left is

A. 2 g H₂
B. 4 g N₂
C. 5 g H₂
✓
D. 0 g

📝 Explanation

N₂ = 0.5 mol. H₂ required = 1.5 mol but available = 4 mol. Excess H₂ = 2.5 mol = 5 g.

📖 Additional Information

  • 2 g H₂
  • 4 g N₂
  • 5 g H₂
  • 0 g

N₂ = 0.5 mol. H₂ required = 1.5 mol but available = 4 mol. Excess H₂ = 2.5 mol = 5 g.

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