A gas diffuses 1/2 times as fast as hydrogen, its molecular mass is:
Correct answer: D. 8 amu
- A. 50 amu
- B. 25 amu
- C. 16 amu
- D. 8 amu
Explanation
Graham found experimentally that the rate of diffusion of a gas is inversely proportional to the square root of the mass of its particles. v1/v2=√(M2/M1) where M1=H2 v1/(1/2)v1 =√(M2/2) 2²=M2/2 => M2 = 4×2 = 8
This question appeared on the ETEA MDCAT 2019 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Kinetic Molecular Theory
Kinetic molecular theory explains gases as rapidly moving particles separated by large distances, with negligible volume and negligible intermolecular attraction in the ideal model. It relates temperature to average kinetic energy and explains gas pressure, Boyle's and Charles's laws, diffusion, effusion and the conditions under which real gases deviate from ideal behavior.
Practise Gases
443 free Gases MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Chemistry questions like this
Chemistry is on 14 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Kinetic Molecular Theory questions
At standard conditions 45 liters of oxygen gas weight about 64 g, where as 45 liters of hydrogen weight only 4g. Which gas defuse faster ? Calculate how much faster.
Which is the correct statement?
Which statement is wrong about the fourth state of matter known as plasma?
Four gas molecules have the speed 8.0 ms-1, 6.0 ms-1, 6.0 ms-1 and √120 ms-1 . What is their root-mean-square speed?