PYQ Vault
EbooksTutor

Collision frequency of gas molecules

This type of question, asked 4 times: 6 Apr 2023, 5 Apr 2024, 4 Apr 2025, 22 Jan 2026 S2. All 4 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    6 Apr 2023

    4
    The number of air molecules per cm3cm^{3} increased from 3×10193 \times10^{19} to 12×101912 \times10^{19}. The ratio of collision frequency of air molecules before and after the increase in number respectively is

    Tap an option to check your answer.

  2. Question 2

    5 Apr 2024

    10
    If the collision frequency of hydrogen molecules in a closed chamber at 27∘C27^{\circ}C is ZZ, then the collision frequency of the same system at 127∘C127^{\circ}C is :

    Tap an option to check your answer.

  3. Question 3

    4 Apr 2025

    1
    The mean free path and the average speed of oxygen molecules at 300 K and 1 atm are 3×10−7 m3 \times10^{- 7}\text{ }m and 600 m/s600\text{ }m/s, respectively. Find the frequency of its collisions.

    Tap an option to check your answer.

  4. Question 4

    22 Jan 2026 S2

    3
    Consider two boxes containing ideal gases A and B such that their temperatures, pressures and number densities are same. The molecular size of A is half of that of B and mass of molecule A is four times that of B. If the collision frequency in gas B is 32×10832 \times 10^{8}/s then collision frequency in gas A is ____\_\_\_\_ /s.

    Tap an option to check your answer.