PHYSICS-Kinetic Theory of Gases Questions and Answers
Practice ModeShowing 10 of 20 questions
Q1
What is the relationship between pressure and volume of a gas at constant temperature according to Boyle's law?
Answer: Option B
Explanation: Boyle's law states that pressure is inversely proportional to volume when temperature is constant.
Q2
Which of the following is NOT an assumption of the kinetic theory of gases?
Answer: Option D
Explanation: Gas molecules do have mass, though very small. The kinetic theory assumes molecules have negligible volume, not zero mass.
Q3
What happens to the average kinetic energy of gas molecules when temperature is doubled?
Answer: Option A
Explanation: Average kinetic energy is directly proportional to absolute temperature.
Q4
At constant volume, pressure of a gas is proportional to:
Answer: Option B
Explanation: Gay-Lussac's law states that pressure is proportional to temperature at constant volume.
Q5
The root mean square speed of gas molecules depends on:
Answer: Option C
Explanation: RMS speed depends on temperature and molecular mass.
Q6
Which gas law combines Boyle's, Charles' and Gay-Lussac's laws?
Answer: Option B
Explanation: Ideal gas equation PV = nRT combines all three gas laws.
Q7
What is the value of universal gas constant R?
Answer: Option C
Explanation: R = 8.314 J/mol·K is the standard value.
Q8
At absolute zero temperature, what happens to gas molecules?
Answer: Option C
Explanation: At absolute zero, molecular motion ceases according to kinetic theory.
Q9
The average kinetic energy of gas molecules is directly proportional to:
Answer: Option C
Explanation: KE_avg = (3/2)kT shows direct proportionality to absolute temperature.
Q10
Which of the following has the same RMS speed at same temperature?
Answer: Option D
Explanation: RMS speed depends on molecular mass. Same mass means same RMS speed at same temperature.