Everyday ScienceGaseous Exchange
A human breath per minute is
16-30 times
16-20 times
15-20 times
15-18 times
16-20 times
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Vitamin C is soluble inA. fat
B. water
C. ethers
D. phenols
The disorder in which, bronchi are inflamed and more mucus production occurs is
A. emphysema
B. asthma
C. pneumonia
D. bronchitis
The epiglottis, a flap of tissues covers the
A. pharynx
B. nostrils
C. nasal cavity
D. glottis
The density of air in the atmosphere is
A. uniform
B. not uniform
C. zero
D. none of above
The amount of carbon dioxide (CO2) present in the inspired air is
A. 0.0006
B. 0.0004
C. 0.04
D. 0.06
In the body, the weight of blood is about
A. 1/12th of body
B. 1/5th of body
C. 1/8th of body
D. 1/4th of body
Which substance is present in fuel?
A. Iron
B. Gold
C. Carbon
D. Copper
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