1. What is the mathematical form of the Ideal Gas Law?
A. P = nRTV
B. PV = nRT
C. PT = nRV
D. V = PnRT
2. In the equation PV = nRT, what does P represent?
A. Power
B. Pressure
C. Particle size
D. Potential energy
3. In PV = nRT, what does V stand for?
A. Velocity
B. Volume
C. Vapor pressure
D. Viscosity
4. What does n represent in the Ideal Gas Law?
A. Number of atoms
B. Number of molecules
C. Number of moles
D. Number of gases
5. What does R stand for in PV = nRT?
A. Reaction rate
B. Gas constant
C. Radius
D. Resistance
6. Which temperature unit must be used in the Ideal Gas Law?
A. Celsius
B. Fahrenheit
C. Kelvin
D. Degree
7. Which value of R is commonly used when pressure is in atm and volume is in liters?
A. 8.314 J/mol·K
B. 0.0821 L·atm/mol·K
C. 22.4 L/mol
D. 1.00 atm
8. Which value of R is used with SI units?
A. 8.314 J/mol·K
B. 0.0821 L·atm/mol·K
C. 273 K
D. 760 mmHg
9. The Ideal Gas Law is derived by combining which gas laws?
A. Boyle’s Law, Charles’s Law, and Avogadro’s Law
B. Newton’s Law and Pascal’s Law
C. Dalton’s Law and Henry’s Law only
D. Graham’s Law and Raoult’s Law
10. Boyle’s Law states that at constant temperature:
A. Pressure is directly proportional to volume
B. Pressure is inversely proportional to volume
C. Volume is directly proportional to moles
D. Temperature is inversely proportional to pressure
11. Charles’s Law states that at constant pressure:
A. Volume is directly proportional to temperature
B. Volume is inversely proportional to temperature
C. Pressure is directly proportional to volume
D. Moles are inversely proportional to volume
12. Avogadro’s Law states that volume is directly proportional to:
A. Pressure
B. Temperature only
C. Number of moles
D. Density
13. Which equation shows the relationship before introducing R in the derivation?
A. PV ∝ nT
B. PVT = nR
C. Pn ∝ VT
D. V ∝ PTn
14. What condition makes a gas behave more ideally?
A. High pressure and low temperature
B. Low pressure and high temperature
C. High pressure and high density
D. Low temperature and small volume
15. Real gases deviate most from ideal behavior at:
A. Low pressure and high temperature
B. High pressure and low temperature
C. Room temperature only
D. Constant volume only
16. If pressure increases while volume, moles, and R remain constant, temperature will:
A. Decrease
B. Increase
C. Stay zero
D. Become negative
17. If volume increases while pressure, moles, and R remain constant, temperature will:
A. Increase
B. Decrease
C. Remain unchanged
D. Become Celsius
18. What is the formula to find pressure using the Ideal Gas Law?
A. P = nRT / V
B. P = V / nRT
C. P = RT / nV
D. P = nV / RT
19. What is the formula to find volume using PV = nRT?
A. V = P / nRT
B. V = nRT / P
C. V = PT / nR
D. V = PR / nT
20. What is the formula to find number of moles?
A. n = PV / RT
B. n = RT / PV
C. n = PR / VT
D. n = VT / PR
21. What is the formula to find temperature?
A. T = PV / nR
B. T = nR / PV
C. T = P / VnR
D. T = V / PnR
22. A gas has n = 2 mol, T = 300 K, V = 10 L, and R = 0.0821 L·atm/mol·K. What is the pressure?
A. 2.46 atm
B. 4.93 atm
C. 6.12 atm
D. 8.21 atm
23. What volume will 1 mole of gas occupy at 273 K and 1 atm using R = 0.0821 L·atm/mol·K?
A. 11.2 L
B. 22.4 L
C. 24.5 L
D. 44.8 L
24. Standard Temperature and Pressure, STP, commonly refers to:
A. 0°C and 1 atm
B. 25°C and 2 atm
C. 100°C and 1 atm
D. 273°C and 1 atm
25. At STP, 1 mole of an ideal gas occupies approximately:
A. 1 L
B. 10 L
C. 22.4 L
D. 273 L
26. If temperature is given as 27°C, what value should be used in PV = nRT?
A. 27 K
B. 246 K
C. 300 K
D. 327 K
27. Why is Kelvin used instead of Celsius in gas law calculations?
A. Kelvin has no negative values in normal gas law calculations
B. Kelvin is smaller than Celsius
C. Celsius is not a real temperature scale
D. Kelvin is used only for liquids
28. If the amount of gas increases while pressure and temperature remain constant, volume will:
A. Decrease
B. Increase
C. Stay the same
D. Become zero
29. Which assumption belongs to the ideal gas model?
A. Gas particles have strong attraction
B. Gas particles occupy large volume
C. Gas particles have negligible volume and no intermolecular forces
D. Gas particles do not move
30. The Ideal Gas Law is useful because it connects:
A. Mass, density, and gravity
B. Pressure, volume, moles, and temperature
C. Speed, force, and distance
D. Heat, light, and sound
