Q1. Which gas behaves most like an ideal gas? (2020)
Solution:
Helium behaves most like an ideal gas because it is a monoatomic gas with weak intermolecular forces.
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Q2. The pressure of an ideal gas is inversely proportional to its volume at constant temperature. This relationship is known as: (2022)
Solution:
This relationship is known as Boyle's Law, which states that the pressure of an ideal gas is inversely proportional to its volume at constant temperature.
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Q3. Which gas would have the highest root mean square speed at the same temperature? (2019)
Solution:
Hydrogen (H2) has the lowest molar mass among the given gases, thus it has the highest root mean square speed at the same temperature.
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Q4. In the kinetic theory of gases, the term 'elastic collision' means: (2019)
Solution:
In elastic collisions, both kinetic energy and momentum are conserved, which is a key assumption in the kinetic theory of gases.
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Q5. The law that relates the pressure and volume of a gas at constant temperature is known as: (2019)
Solution:
Boyle's Law states that the pressure of a gas is inversely proportional to its volume at constant temperature.
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Q6. The concept of absolute zero is defined as the temperature at which: (2020)
Solution:
Absolute zero is defined as the temperature at which molecular motion ceases, corresponding to 0 Kelvin.
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Q7. Which gas behaves most like an ideal gas under standard conditions? (2019)
Solution:
Helium behaves most like an ideal gas under standard conditions due to its low intermolecular forces and small size.
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Q8. The average speed of gas molecules is given by which of the following formulas? (2023)
Solution:
The average speed of gas molecules is given by the formula v_avg = sqrt(8kT/πm), where k is the Boltzmann constant, T is the temperature, and m is the mass of a molecule.
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Q9. What is the root mean square speed of gas molecules at a temperature T? (2021)
Solution:
The root mean square speed (v_rms) of gas molecules is given by the formula v_rms = √(3RT/M), where R is the universal gas constant, T is the temperature, and M is the molar mass.
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Q10. The concept of absolute zero refers to: (2020)
Solution:
Absolute zero refers to the lowest possible temperature, at which gas molecules theoretically stop moving, making both A and B correct.
