Question

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 __________.

• A. 0.25
• B. 0.33
• C. 0.5
• D. 0.75

Answer 1

The correct option is A 0.25

Total pressure $=200+150+320+130=800mm$

Volume fraction of $H_2=\frac{P_{H_2}}{P_T}=\frac{200}{800}=0.25$