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

During the reaction CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂, complete decomposition of 0.5 mole CaCO₃ produces carbon dioxide occupying

A. 5.6 dm³
B. 11.2 dm³
✓
C. 22.4 dm³
D. 44.8 dm³

📝 Explanation

Half a mole of CO₂ occupies 11.2 dm³ at STP.

📖 Additional Information

  • 5.6 dm³
  • 11.2 dm³
  • 22.4 dm³
  • 44.8 dm³

Half a mole of CO₂ occupies 11.2 dm³ at STP.

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