Equal volumes of CO,SO2, NO2 and H2S were released into a room at the same point and time. Which of the following gives the order of diffusion of the gases to the opposite corner of the room?

 Equal volumes of CO,SO2, NO2 and H2S were released into a room at the same point and time. Which of the following gives the order of diffusion of the gases to the opposite corner of the room?

(S = 32, C = 12, O = 16, N = 14, H = 1)

• A. CO, SO2,NO2,H2S
• B. SO2,NO2,H2S,CO
• C. CO,H2S,SO2,NO2
• D. CO,H2S,NO2,SO2

Correct Answer: Option D

Explanation

- At a constant temperature and pressure, the rate of diffusion of a gas is inversely proportional to the rate of its relative molecular mass.

- The higher the RMM of a gas the Lower the rate of diffusion and vice versa

- Hence; CO,H2S,NO2,SO2 will be the order of diffusion.

Jamb 1990 question 7