MyQuestionIcon

1

You visited us 1 times! Enjoying our articles? Unlock Full Access!

Breathing

The percentag...

Question

The percentage of oxygen in inhaled air is ___________.

A

10%

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

21%

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

C

15%

No worries! We‘ve got your back. Try BYJU‘S free classes today!

D

4.4%

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is B
21%

Inhalation is the process of drawing of air into the lungs. During the process of inhalation, the lung volume expands as a result of the contraction of the diaphragm and intercostal muscles. The air that we inhale contains 21% oxygen. The percentage of carbon dioxide in exhaled air is 4.4%.

Suggest Corrections

thumbs-up

1

Similar questions

The percentage of oxygen in inhaled air is 21%.

Q. A scientist performed experiments to analyse the two samples of air given to him:
'Air Sample A' and 'Air Sample B'. The results of analysis of these two air samples are given below:

Air Sample A				Air Sample B
Oxygen	:	21%		Oxygen	:	16.4%
Carbon dioxide	:	0.04%		Carbon dioxide	:	4.4%
Water vapour	:	A little		Water Vapour	:	A lot

(a) Which air sample, A or B, represents 'exhaled air'? Why?
(b) Which air sample, A or B, represents 'inhaled air'? Why?

Q. As oxygen is ______ soluble in water, air dissolved in water contains a higher percentage of oxygen (

30 - 35

%) than ordinary air (

21

Q. As oxygen is ______ soluble in water. Air dissolved in water contains a higher percentage of oxygen (30-35%) than ordinary air (21%).

Q. Air dissolved in water contains a higher percentage of oxygen

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

How Do We Breathe?

BIOLOGY

Watch in App

explore_more_icon

Explore more

Standard VII Biology

Join BYJU'S Learning Program

CrossIcon