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MCQ for BITSAT Physics Kinetic Theory
Are you studying BITSAT Physics? Look at these 50 questions with answers to make your core concepts of Kinetic Theory very clear.
Get Kinetic Theory MCQs for BITSAT Physics
Question: Five gas molecules chosen at random are found to have speeds of 500, 600, 700, 800 and 900 m/s. Then which of the following statements is correct?
- a) The root mean square speed and the average speed are the same.
- b) The root mean square speed is 14 m/s higher than the average speed.
- c) The root mean square speed is 14 m/s lower than the average speed.
- d) The root mean square speed is √14 m/s higher than the average speed
Answer: The root mean square speed is 14 m/s higher than the average speed.
Question: The molecules of a given mass of a gas have r.m.s. velocity of 200 ms–1 at 27°C and 1.0 × 105 Nm–2 pressure. When the temperature and pressure of the gas are respectively, 127°C and 0.05 × 105 Nm–2, the r.m.s. velocity of its molecules in ms–1 is :
- a) 100 √2
- b)
- c)
- d)
Answer:
Question: A vessel of volume 20L contains a mixture of hydrogen and helium at temperature of 27°C and pressure 2 atm. The mass of mixture is 5g. Assuming the gases to be ideal, the ratio of mass of hydrogen to that of helium in the given mixture will be
- a) 1 : 2
- b) 2 : 3
- c) 2 : 1
- d) 2 : 5
Answer: 2 : 5
Question: In the kinetic theory of gases, which of these statements is/are true ? (i) The pressure of a gas is proportional to the mean speed of the molecules. (ii) The root mean square speed of the molecules is proportional to the pressure. (iii) The rate of diffusion is proportional to the mean speed of the molecules. (iv) The mean translational kinetic energy of a gas is proportional to its kelvin temperature.
- a) (ii) and (iii) only
- b) (i),(ii)and (iv) only
- c) (i) and (iii) only
- d) (iii) and (iv) only
Answer: (iii) and (iv) only
Question: If a gas has ‘n’ degrees of freedom, the ratio of the specific heats g of the gas is
- a)
- b)
- c)
- d)
Answer:
Question: Two gases occupy two containers A and B the gas in A, of volume 0.10m3, exerts a pressure of 1.40 MPa and that in B of volume 0.15m3 exerts a pressure 0.7 MPa. The two containers are united by a tube of negligible volume and the gases are allowed to intermingle. Then if the temperature remains constant, the final pressure in the container will be (in MPa)
- a) 0.70
- b) 0.98
- c) 1.40
- d) 210
Answer: 0.98
Question: The average translational kinetic energy of O2 (molar mass 32) molecules at a particular temperature is 0.048 eV. The translational kinetic energy of N2 (molar mass 28) molecules in eV at the same temperature is
- a) 0.0015
- b) 0.003
- c) 0.048
- d) 0.768
Answer: 0.048
Question: For a gas if ratio of specific heats at constant pressure and volume is γ then value of degrees of freedom is
- a)
- b)
- c)
- d)
Answer:
Question: An air bubble of volume v0 is released by a fish at a depth h in a lake. The bubble rises to the surface. Assume constant temperature and standard atmospheric pressure above the lake. The volume of the bubble just before touching the surface will be (density) of water is ρ
- a) v0
- b) v0(rgh/p)
- c)
- d)
Answer:
Question: The molecules of a given mass of gas have a root mean square velocity of 200m s–1 at 27°C and 1.0 × 105 N m–2 pressure. When the temperature is 127°C and the pressure 0.5 × 105 Nm –2, the root mean square velocity in ms–1, is
- a)
- b)
- c)
- d)
Answer:
Question: 3 moles of an ideal gas at a temperature of 27°C are mixed with 2 moles of an ideal gas at a temperature 227°C, determine the equilibrium temperature of the mixture, assuming no loss of energy.
- a) 327°C
- b) 107°C
- c) 318°C
- d) 410°C
Answer: 107°C
Question: Which one the following graphs represents the behaviour of an ideal gas
- a)
- b)
- c)
- d)
Answer:
Question: The ratio of mean kinetic energy of hydrogen and oxygen at a given temperature is-
- a) 1 : 16
- b) 1 : 8
- c) 1 : 4
- d) 1 : 1
Answer: 1 : 1
Question: An ideal gas has volume V and pressure P. The total translational kinetic energy of the gas
- a)
- b)
- c)
- d)
Answer:
Question: One mole of a gas occupies 22.4 lit at N.T.P. Calculate the difference between two molar specific heats of the gas. J = 4200 J/kcal.
- a) 1.979 k cal/kmol K
- b) 2.378 k cal/kmol K
- c) 4.569 kcal/kmol K
- d) 3.028 k cal/ kmol K
Answer: 1.979 k cal/kmol K
Question: Four mole of hydrogen, two mole of helium and one mole of water vapour form an ideal gas mixture. What is the molar specific heat at constant pressure of mixture?
- a)
- b)
- c) R
- d)
Answer:
Question: A real gas behaves as an ideal gas
- a) At very low pressure and high temperature
- b) High pressure and low temperature
- c) High temperature and high pressure
- d) Low pressure and low temperature
Answer: At very low pressure and high temperature
Question: The ratio of mean kinetic energy of hydrogen and oxygen at a given temperature is-
- a) 1 : 16
- b) 1 : 8
- c) 1 : 4
- d) 1 : 1
Answer: 1 : 1
Question: 3 moles of an ideal gas at a temperature of 27°C are mixed with 2 moles of an ideal gas at a temperature 227°C, determine the equilibrium temperature of the mixture, assuming no loss of energy.
- a) 327°C
- b) 107°C
- c) 318°C
- d) 410°C
Answer: 107°C
Question: Five gas molecules chosen at random are found to have speeds of 500, 600, 700, 800 and 900 m/s. Then which of the following statements is correct?
- a) The root mean square speed and the average speed are the same.
- b) The root mean square speed is 14 m/s higher than the average speed.
- c) The root mean square speed is 14 m/s lower than the average speed.
- d) The root mean square speed is √14 m/s higher than the average speed.
Answer: The root mean square speed is 14 m/s higher than the average speed.
Free study material for Physics
Kinetic Theory Objective Questions & Solutions for BITSAT Physics
Chapter MCQs with Answers for BITSAT Physics
Review these MCQs for Kinetic Theory to check your active preparation status. Aligned with current BITSAT standards for BITSAT Physics, these multiple-choice sets offer targeted daily drills. Routine practice on these objective questions ensures a solid grasp of key concepts for upcoming tests.
NCERT-Aligned MCQs for BITSAT Physics
Our expert teachers have designed these Physics MCQs based on the official NCERT book for BITSAT. We have identified all questions from the most important topics that are always asked in exams. After solving these, please compare your choices with our provided answers. For better understanding of Kinetic Theory, you should also refer to our NCERT solutions for BITSAT Physics created by our team.
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FAQs
You can get most exhaustive BITSAT Physics Kinetic Theory MCQs for free on StudiesToday.com. These MCQs for BITSAT Physics are updated for the 2026-27 academic session as per BITSAT examination standards.
Yes, our BITSAT Physics Kinetic Theory MCQs include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the BITSAT paper is now competency-based.
By solving our BITSAT Physics Kinetic Theory MCQs, BITSAT students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Physics.
Yes, Physics MCQs for BITSAT have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused BITSAT exams.
Yes, you can also access online interactive tests for BITSAT Physics Kinetic Theory MCQs on StudiesToday.com as they provide instant answers and score to help you track your progress in Physics.