A container with a porous wall has a mixture of H2, He, N2 and O2. Which of these gases will take maximum time in getting out of the container?
Correct answer: D. O2
- A. H2
- B. He
- C. N2
- D. O2
Explanation
The rate of effusion of a gas is inversely proportional to the square root of its molar mass, according to Graham's law of effusion. The formula for Graham's law is:So, the gas with the lowest molar mass will effuse the fastest. Let's compare the molar masses of the gases mentioned: H2: ~2 g/mol He: ~4 g/mol N2: ~28 g/mol O2: ~32 g/molSince O2 has the highest molar mass among the options, it will take the maximum time to effuse through the porous wall.
Last updated
About Atomic Structure
Atomic structure covers the discovery of the proton, Planck's quantum theory, hydrogen emission spectra and the evidence for quantized energy levels. You will use quantum numbers to describe orbitals, distinguish s, p, d and f orbital shapes, and write electronic configurations, including the correct order of electron filling.
Practise Atomic Structure
922 free Atomic Structure MCQs from Chemistry, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Chemistry questions like this
Chemistry is on 12 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
168 O-2 has how many electrons in s-orbitals?
3s2, 3p4 valence shell electronic configuration corresponds to ?
6Y = 2s12P1x2P1y2P1z this is_configuration
A 1-kW radio frequency of 880 KHz. How many quantas per second does it emit?
A 1kW radio transmitter operates at a frequency of 880 kHz. How many quanta per second does it emit?