Q. At constant temperature, what happens to the pressure of a gas if its volume is halved?
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A.
Pressure doubles
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B.
Pressure halves
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C.
Pressure remains the same
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D.
Pressure quadruples
Solution
According to Boyle's Law, at constant temperature, pressure is inversely proportional to volume. Halving the volume doubles the pressure.
Correct Answer:
A
— Pressure doubles
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Q. In a closed container, if the temperature of a gas is increased, what happens to its pressure?
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A.
Pressure decreases
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B.
Pressure increases
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C.
Pressure remains constant
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D.
Pressure fluctuates
Solution
According to Gay-Lussac's Law, at constant volume, the pressure of a gas is directly proportional to its temperature in Kelvin.
Correct Answer:
B
— Pressure increases
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Q. In the context of gas laws, what does 'R' represent in the ideal gas equation?
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A.
Gas constant
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B.
Rate of reaction
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C.
Universal gas law
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D.
Reaction quotient
Solution
'R' in the ideal gas equation PV = nRT represents the universal gas constant, which relates the energy scale to the temperature scale.
Correct Answer:
A
— Gas constant
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Q. What happens to the volume of a gas when it is compressed at constant temperature?
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A.
Volume increases
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B.
Volume decreases
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C.
Volume remains the same
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D.
Volume fluctuates
Solution
According to Boyle's Law, at constant temperature, the volume of a gas decreases when the pressure increases due to compression.
Correct Answer:
B
— Volume decreases
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Q. Which law describes the relationship between the volume and temperature of a gas at constant pressure?
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A.
Boyle's Law
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B.
Charles's Law
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C.
Avogadro's Law
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D.
Graham's Law
Solution
Charles's Law states that the volume of a gas is directly proportional to its temperature (in Kelvin) at constant pressure.
Correct Answer:
B
— Charles's Law
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Q. Which of the following gases behaves most ideally?
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A.
Noble gases
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B.
Water vapor
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C.
Carbon dioxide
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D.
Ammonia
Solution
Noble gases behave most ideally because they have minimal intermolecular forces and occupy a larger volume relative to their number of moles.
Correct Answer:
A
— Noble gases
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