Same chapter3 marksDifficulty: Medium
Calculate the root mean square speed of oxygen molecules at 300 K. Take R = 8.31 J mol−1 K−1 and M = 0.032 kg mol−1.
Behaviour of Perfect Gases and Kinetic Theory of Gases
3 marksDifficulty: Medium
State the postulates of the kinetic theory of gases.
Original Khojo Papers practice question — not from a past board paper.
Answer
A gas consists of a very large number of identical molecules in continuous random motion. The molecules are point masses whose total volume is negligible compared with that of the container. They exert no force on one another except during collisions, which are perfectly elastic and of negligible duration. The average kinetic energy of the molecules is proportional to the absolute temperature.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
Real gases depart from these assumptions at high pressure and low temperature.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
What is mean free path, and on what does it depend?
Behaviour of Perfect Gases and Kinetic Theory of Gases
Same chapter3 marksDifficulty: Medium
Calculate the volume occupied by 2 moles of an ideal gas at 300 K and 1 atmosphere. Take R = 8.31 J mol−1 K−1 and 1 atm = 1.013 × 105 Pa.
Behaviour of Perfect Gases and Kinetic Theory of Gases
Same chapter3 marksDifficulty: Medium
State the law of equipartition of energy and give the degrees of freedom of a monatomic and a diatomic gas molecule.
Behaviour of Perfect Gases and Kinetic Theory of Gases
Same subject3 marksDifficulty: Medium
For a projectile launched at speed u, at what angle is the horizontal range greatest, and what is that range?
Kinematics
Same subject3 marksDifficulty: Medium
How many significant figures are there in 0.00420, 1.030 and 6.023 × 1023?
Physical World and Measurement