Q. According to Boyle's law, if the volume of a gas is doubled at constant temperature, what happens to the pressure?
-
A.
It doubles
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B.
It halves
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C.
It remains constant
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D.
It quadruples
Solution
Boyle's law states that pressure is inversely proportional to volume at constant temperature, so if the volume is doubled, the pressure halves.
Correct Answer: B — It halves
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Q. According to Boyle's law, if the volume of a gas is doubled, what happens to its pressure?
-
A.
It doubles
-
B.
It halves
-
C.
It remains constant
-
D.
It quadruples
Solution
Boyle's law states that pressure is inversely proportional to volume at constant temperature, so if volume is doubled, pressure is halved.
Correct Answer: B — It halves
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Q. According to Graham's law of effusion, the rate of effusion of a gas is inversely proportional to what?
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A.
Molar mass
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B.
Temperature
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C.
Pressure
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D.
Volume
Solution
Graham's law states that the rate of effusion is inversely proportional to the square root of the molar mass of the gas.
Correct Answer: A — Molar mass
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Q. According to the ideal gas law, which of the following is the correct equation?
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A.
PV = nRT
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B.
PV = nR
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C.
P = nRT/V
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D.
V = nP/RT
Solution
The ideal gas law is represented by the equation PV = nRT.
Correct Answer: A — PV = nRT
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Q. According to the kinetic molecular theory, which of the following statements is true?
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A.
Gas particles have significant volume.
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B.
Gas particles are in constant motion.
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C.
Gas particles attract each other.
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D.
Gas particles do not collide.
Solution
According to the kinetic molecular theory, gas particles are in constant motion.
Correct Answer: B — Gas particles are in constant motion.
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Q. At constant temperature, the volume of a gas is inversely proportional to its pressure. This is known as which law?
-
A.
Boyle's Law
-
B.
Charles's Law
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C.
Avogadro's Law
-
D.
Ideal Gas Law
Solution
Boyle's Law states that for a given mass of gas at constant temperature, the volume is inversely proportional to the pressure.
Correct Answer: A — Boyle's Law
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Q. At what temperature does the volume of a gas become zero according to Charles's Law?
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A.
0 K
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B.
-273.15 °C
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C.
273.15 K
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D.
None of the above
Solution
According to Charles's Law, the volume of a gas approaches zero at absolute zero, which is -273.15 °C.
Correct Answer: B — -273.15 °C
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Q. If the temperature of a gas is doubled at constant pressure, what happens to its volume?
-
A.
It halves
-
B.
It doubles
-
C.
It remains the same
-
D.
It quadruples
Solution
According to Charles's Law, at constant pressure, the volume of a gas is directly proportional to its temperature.
Correct Answer: B — It doubles
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Q. In the ideal gas equation PV=nRT, what does 'n' represent?
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A.
Pressure
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B.
Volume
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C.
Number of moles
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D.
Temperature
Solution
'n' represents the number of moles of the gas in the ideal gas equation.
Correct Answer: C — Number of moles
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Q. In the van der Waals equation, what do the constants 'a' and 'b' represent?
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A.
Pressure and volume
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B.
Attraction and volume
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C.
Temperature and pressure
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D.
Volume and temperature
Solution
'a' accounts for the attractive forces between molecules, while 'b' accounts for the volume occupied by the gas molecules.
Correct Answer: B — Attraction and volume
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Q. In which of the following conditions does a gas deviate most from ideal behavior?
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A.
High temperature and low pressure
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B.
Low temperature and high pressure
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C.
High temperature and high pressure
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D.
Low temperature and low pressure
Solution
A gas deviates most from ideal behavior at low temperatures and high pressures due to increased intermolecular forces.
Correct Answer: B — Low temperature and high pressure
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Q. What happens to the pressure of a gas if the volume is doubled at constant temperature?
-
A.
It doubles
-
B.
It halves
-
C.
It remains the same
-
D.
It quadruples
Solution
According to Boyle's Law, if the volume is doubled at constant temperature, the pressure halves.
Correct Answer: B — It halves
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Q. What happens to the pressure of a gas if the volume is halved at constant temperature?
-
A.
It doubles
-
B.
It halves
-
C.
It remains the same
-
D.
It quadruples
Solution
According to Boyle's Law, if the volume is halved, the pressure doubles at constant temperature.
Correct Answer: A — It doubles
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Q. What happens to the pressure of a gas if the volume is halved while the temperature remains constant?
-
A.
Pressure doubles
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B.
Pressure halves
-
C.
Pressure remains the same
-
D.
Pressure quadruples
Solution
According to Boyle's Law, if the volume is halved, the pressure doubles.
Correct Answer: A — Pressure doubles
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Q. What happens to the volume of a gas if the temperature is increased at constant pressure?
-
A.
It decreases
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B.
It increases
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C.
It remains the same
-
D.
It becomes zero
Solution
According to Charles's law, the volume of a gas increases with an increase in temperature at constant pressure.
Correct Answer: B — It increases
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Q. What is the critical temperature of a gas?
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A.
The temperature above which a gas cannot be liquefied
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B.
The temperature at which a gas condenses
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C.
The temperature at which a gas expands
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D.
The temperature at which a gas is at its maximum density
Solution
The critical temperature is the temperature above which a gas cannot be liquefied, regardless of the pressure applied.
Correct Answer: A — The temperature above which a gas cannot be liquefied
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Q. What is the effect of increasing temperature on the kinetic energy of gas molecules?
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A.
Increases kinetic energy
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B.
Decreases kinetic energy
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C.
No effect
-
D.
Depends on the gas
Solution
Increasing temperature increases the kinetic energy of gas molecules.
Correct Answer: A — Increases kinetic energy
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Q. What is the molar volume of an ideal gas at standard temperature and pressure (STP)?
-
A.
22.4 L
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B.
24.5 L
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C.
18.0 L
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D.
30.0 L
Solution
The molar volume of an ideal gas at STP is 22.4 L.
Correct Answer: A — 22.4 L
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Q. What is the molar volume of an ideal gas at STP (Standard Temperature and Pressure)?
-
A.
22.4 L
-
B.
24.5 L
-
C.
18.0 L
-
D.
30.0 L
Solution
The molar volume of an ideal gas at STP is 22.4 L.
Correct Answer: A — 22.4 L
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Q. What is the molar volume of an ideal gas at STP?
-
A.
22.4 L
-
B.
24.5 L
-
C.
18.0 L
-
D.
30.0 L
Solution
The molar volume of an ideal gas at standard temperature and pressure (STP) is 22.4 L.
Correct Answer: A — 22.4 L
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Q. What is the relationship between pressure and temperature for a fixed amount of gas at constant volume?
-
A.
Directly proportional
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B.
Inversely proportional
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C.
No relationship
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D.
Exponential
Solution
Pressure and temperature are directly proportional for a fixed amount of gas at constant volume, as described by Gay-Lussac's law.
Correct Answer: A — Directly proportional
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Q. What is the relationship between pressure and temperature in Gay-Lussac's Law?
-
A.
Directly proportional
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B.
Inversely proportional
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C.
No relationship
-
D.
Exponential relationship
Solution
Gay-Lussac's Law states that pressure is directly proportional to temperature when volume is constant.
Correct Answer: A — Directly proportional
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Q. What is the relationship between the density of a gas and its molar mass at constant temperature and pressure?
-
A.
Density is directly proportional to molar mass
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B.
Density is inversely proportional to molar mass
-
C.
Density is independent of molar mass
-
D.
Density is equal to molar mass
Solution
At constant temperature and pressure, density is directly proportional to molar mass according to the ideal gas law.
Correct Answer: A — Density is directly proportional to molar mass
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Q. What is the value of the universal gas constant R in L·atm/(K·mol)?
-
A.
0.0821
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B.
8.314
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C.
62.36
-
D.
1.987
Solution
The universal gas constant R is 0.0821 L·atm/(K·mol).
Correct Answer: A — 0.0821
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Q. Which gas has the highest density at the same temperature and pressure?
Solution
CO2 has the highest density among the given gases at the same temperature and pressure.
Correct Answer: D — CO2
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Q. Which gas has the highest rate of diffusion at a given temperature?
Solution
Helium (He) has the highest rate of diffusion due to its low molar mass.
Correct Answer: C — He
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Q. Which gas law relates pressure and temperature at constant volume?
-
A.
Boyle's Law
-
B.
Charles's Law
-
C.
Avogadro's Law
-
D.
Gay-Lussac's Law
Solution
Gay-Lussac's Law relates pressure and temperature at constant volume.
Correct Answer: D — Gay-Lussac's Law
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Q. Which gas law relates the volume and temperature of a gas at constant pressure?
-
A.
Boyle's Law
-
B.
Charles's Law
-
C.
Avogadro's Law
-
D.
Graham's Law
Solution
Charles's Law states that the volume of a gas is directly proportional to its temperature at constant pressure.
Correct Answer: B — Charles's Law
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Q. Which gas law relates volume and temperature at constant pressure?
-
A.
Boyle's Law
-
B.
Charles's Law
-
C.
Avogadro's Law
-
D.
Ideal Gas Law
Solution
Charles's Law states that the volume of a gas is directly proportional to its temperature at constant pressure.
Correct Answer: B — Charles's Law
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Q. Which of the following equations represents the ideal gas law?
-
A.
PV = nRT
-
B.
PV = nR
-
C.
PV = RT
-
D.
P = nRT/V
Solution
The ideal gas law is represented by the equation PV = nRT.
Correct Answer: A — PV = nRT
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