Which one is not the partial pressure of oxygen in the lungs ?
Correct answer: D. 1 atm
- A. 0.1526 atm
- B. 116 mm of Hg
- C. 116 torr
- D. 1 atm
Explanation
A partial pressure is only the pressure contributed by one gas, so oxygen cannot have a partial pressure of 1 atm in the lungs because nitrogen and other gases are also present. The values 0.1526 atm, 116 mm Hg and 116 torr are equivalent because 1 mm Hg equals 1 torr. Students may choose c by treating torr and mm Hg as different units, but they are numerically equivalent here.
Last updated
About Standard Temperature and Pressure
Standard temperature and pressure provide reference conditions for gas calculations: 0°C or 273 K and, in the usual school convention, 1 atm pressure. Questions use these conditions to relate pressure, volume, temperature and amount of gas, including the molar volume of an ideal gas, about 22.4 dm³.
Practise Gases
443 free Gases 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
24g of an unknown gas occupied 8.4dm3at STP, Identify the gas among the following
28g of N¬2 at STP will occupy a volume of:
950 torr corresponds to:
At high altitudes, the pilots feel uncomfortable breathing because the partial pressure of oxygen is lower than:
At standard conditions of temperature and pressure, the ratio of volume of 18g H2O to the volume of 4.4g CO2 will be: