S1.5 Ideal gases Quiz
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5 questions, one answer each
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1. A gas occupies 2.00 dm³ at 100 kPa. At constant temperature the pressure is raised to 400 kPa. What is the new volume?
- A. 0.500 dm³
- B. 8.00 dm³
- C. 2.00 dm³
- D. 0.250 dm³
2. What amount of gas occupies 45.4 dm³ at 273 K and 100 kPa?
- A. 1.00 mol
- B. 2.00 mol
- C. 0.500 mol
- D. 22.7 mol
3. Why does a real gas occupy less volume than predicted at low temperature?
- A. Its particles have negligible volume
- B. Intermolecular attractions pull particles closer
- C. Its collisions are elastic
- D. Its particles move faster
4. A sealed rigid container of gas is heated from 300 K to 600 K. What happens to the pressure?
- A. It halves
- B. It stays the same
- C. It doubles
- D. It increases four times
5. Which gas behaves most ideally at room temperature and pressure?
- A. Helium
- B. Ammonia
- C. Water vapour
- D. Hydrogen chloride