Q. According to Graham's Law, how does the rate of effusion of a gas relate to its molar mass?
A.
Inversely proportional
B.
Directly proportional
C.
Equal
D.
Unrelated
Show solution
Solution
Graham's Law states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass.
Correct Answer:
A
— Inversely proportional
Learn More →
Q. According to Graham's Law, the rate of effusion of a gas is inversely proportional to what?
A.
Its molar mass
B.
Its temperature
C.
Its pressure
D.
Its volume
Show solution
Solution
Graham's Law states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass.
Correct Answer:
A
— Its molar mass
Learn More →
Q. In which phase of matter do particles have the least kinetic energy?
A.
Solid
B.
Liquid
C.
Gas
D.
Plasma
Show solution
Solution
In solids, particles are closely packed and vibrate in fixed positions, resulting in the least kinetic energy compared to liquids, gases, and plasmas.
Correct Answer:
A
— Solid
Learn More →
Q. In which phase of matter do particles have the most kinetic energy?
A.
Solid
B.
Liquid
C.
Gas
D.
Plasma
Show solution
Solution
In plasma, particles have the highest kinetic energy due to the extreme temperatures that ionize the gas.
Correct Answer:
D
— Plasma
Learn More →
Q. What happens to the volume of a gas when the temperature increases at constant pressure?
A.
Volume decreases
B.
Volume increases
C.
Volume remains constant
D.
Volume fluctuates
Show solution
Solution
According to Charles's Law, the volume of a gas increases with an increase in temperature at constant pressure.
Correct Answer:
B
— Volume increases
Learn More →
Q. What is the critical point of a substance?
A.
The temperature at which a substance can exist as a solid
B.
The temperature and pressure at which gas and liquid phases are indistinguishable
C.
The point at which a substance boils
D.
The temperature at which a substance freezes
Show solution
Solution
The critical point is the temperature and pressure at which the gas and liquid phases of a substance become indistinguishable.
Correct Answer:
B
— The temperature and pressure at which gas and liquid phases are indistinguishable
Learn More →
Q. What is the ideal gas law equation?
A.
PV = nRT
B.
PV = nR
C.
PV = RT
D.
P = nRT/V
Show solution
Solution
The ideal gas law is expressed as PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature.
Correct Answer:
A
— PV = nRT
Learn More →
Q. What is the phase change from solid to gas called?
A.
Sublimation
B.
Deposition
C.
Condensation
D.
Evaporation
Show solution
Solution
Sublimation is the phase change from solid directly to gas without passing through the liquid phase.
Correct Answer:
A
— Sublimation
Learn More →
Q. What is the primary factor that determines the state of matter of a substance?
A.
Temperature
B.
Pressure
C.
Intermolecular forces
D.
Molecular weight
Show solution
Solution
The state of matter is primarily determined by the balance between temperature (kinetic energy) and intermolecular forces.
Correct Answer:
C
— Intermolecular forces
Learn More →
Q. What is the relationship between pressure and temperature in a closed container of gas?
A.
Directly proportional
B.
Inversely proportional
C.
No relationship
D.
Exponential relationship
Show solution
Solution
According to Gay-Lussac's Law, pressure is directly proportional to temperature when volume is held constant.
Correct Answer:
A
— Directly proportional
Learn More →
Q. What is the relationship between pressure and temperature in a closed system according to Gay-Lussac's Law?
A.
Pressure is directly proportional to volume
B.
Pressure is inversely proportional to temperature
C.
Pressure is directly proportional to temperature
D.
Pressure is independent of temperature
Show solution
Solution
Gay-Lussac's Law states that the pressure of a gas is directly proportional to its absolute temperature when volume is held constant.
Correct Answer:
C
— Pressure is directly proportional to temperature
Learn More →
Q. What is the value of the ideal gas constant R in L·atm/(K·mol)?
A.
0.0821
B.
8.314
C.
62.36
D.
0.08314
Show solution
Solution
The ideal gas constant R is 0.0821 L·atm/(K·mol), which is commonly used in the ideal gas law.
Correct Answer:
A
— 0.0821
Learn More →
Q. Which gas law relates pressure and volume at constant temperature?
A.
Charles's Law
B.
Avogadro's Law
C.
Boyle's Law
D.
Graham's Law
Show solution
Solution
Boyle's Law states that the pressure of a gas is inversely proportional to its volume at constant temperature (PV = constant).
Correct Answer:
C
— Boyle's Law
Learn More →
Q. Which of the following conditions is most likely to cause a real gas to behave ideally?
A.
High pressure and low temperature
B.
Low pressure and high temperature
C.
High pressure and high temperature
D.
Low pressure and low temperature
Show solution
Solution
Real gases behave more ideally at low pressure and high temperature, where intermolecular forces and molecular volume become less significant.
Correct Answer:
B
— Low pressure and high temperature
Learn More →
Showing 1 to 14 of 14 (1 Pages)