Why do mountaineers face problems when the partial pressure of atmospheric oxygen decreases with altitude?
Answer and explanation
Correct answer: Because available oxygen in each breath decreases
Atmospheric oxygen remains roughly the same percentage of dry air at ordinary altitudes, but total air pressure falls as altitude increases. Consequently, oxygen partial pressure also falls, so each breath provides fewer oxygen molecules to the lungs and blood. This can cause breathlessness, fatigue and altitude-related illness. Option B is correct; A, C and D give scientifically incorrect explanations.
Frequently asked questions
What is the correct answer to this question?
Because available oxygen in each breath decreases
Why is this the correct answer?
Atmospheric oxygen remains roughly the same percentage of dry air at ordinary altitudes, but total air pressure falls as altitude increases. Consequently, oxygen partial pressure also falls, so each breath provides fewer oxygen molecules to the lungs and blood. This can cause breathlessness, fatigue and altitude-related illness. Option B is correct; A, C and D give scientifically incorrect explanations.
Which subject and chapter does this question cover?
This is a Class 11 Accountancy question. Chapter: Bills of Exchange. Topic: Introduction and Concepts.
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