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.
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