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

Strong heating of 10 g CaCO₃ produces carbon dioxide. The volume of CO₂ at STP is

A. 1.12 dm³
B. 2.24 dm³
✓
C. 22.4 dm³
D. 11.2 dm³

📝 Explanation

10 g CaCO₃ = 0.1 mol. One mole CaCO₃ gives one mole CO₂. Therefore volume = 0.1 × 22.4 = 2.24 dm³.

📖 Additional Information

  • 1.12 dm³
  • 2.24 dm³
  • 22.4 dm³
  • 11.2 dm³

10 g CaCO₃ = 0.1 mol. One mole CaCO₃ gives one mole CO₂. Therefore volume = 0.1 × 22.4 = 2.24 dm³.

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