Multiple choice

In a gaseous mixture at $20^{o} C$ the partial pressure of the component gases are as follows: hydrogen 200 mm, carbon dioxide 150 mm, methane 320 mm, ethylene 130 mm. Volume fraction of hydrogen is __________.

  1. 0.25

  2. 0.33

  3. 0.5

  4. 0.75
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A Correct answer
Explanation

Total pressure = 200 + 150 + 320 + 130 = 800 mm. Volume fraction of hydrogen = (Partial pressure of H) / (Total pressure) = 200 / 800 = 0.25.

AI explanation

The total pressure of the mixture is the sum of the partial pressures: 200 mm plus 150 mm plus 320 mm plus 130 mm, which equals 800 mm. According to Dalton's law, the volume fraction of a gas equals its pressure fraction. Dividing the partial pressure of hydrogen by the total pressure gives 200 divided by 800, resulting in a volume fraction of 0.25.

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