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Chemistry NMDCAT MCQs Moles and Avogadro's Numbers
nmdcat.online July 2, 2026

In the reaction 4Al + 3O₂ → 2Al₂O₃, the number of moles of aluminium oxide produced from 108 g of Al is

A. 1 mole
B. 2 moles
✓
C. 3 moles
D. 4 moles

📝 Explanation

108 g Al = 4 moles. The ratio 4Al : 2Al₂O₃ gives 2 moles Al₂O₃.

📖 Additional Information

  • 1 mole
  • 2 moles
  • 3 moles
  • 4 moles

108 g Al = 4 moles. The ratio 4Al : 2Al₂O₃ gives 2 moles Al₂O₃.

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