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General Science for Class 6
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Air and Atmosphere
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Air and Atmosphere
The process in which energy is released by the combination of glucose and oxygen is known as
digestion
photosynthesis
respiration
rusting
Author:
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Comment
Air and Atmosphere
Exhaled air contains 16% oxygen and about 4% of carbon dioxide, the rest of 80% is
neon
argon
nitrogen
none of them
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Comment
Air and Atmosphere
In leaves, gaseous exchange takes place through tiny pores under the leaves known as
stem
stomata
stigma
pollen grain
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Air and Atmosphere
Photosynthesis is a process in which carbon dioxide and water combine to form
carbon
calcium
chlorophyll
carbohydrates
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Comment
Air and Atmosphere
The condensation point of nitrogen gas is
(-156°C)
(-166°C)
(-196°C)
(-186°C)
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Comment
Air and Atmosphere
Respiratory system contains organs necessary for the process of
photosynthesis
respiration
rusting
combustion
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Comment
Air and Atmosphere
Combustion cannot take place without
water
carbon
air
zinc
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Comment
Air and Atmosphere
The fractional distillation is a process in which liquids evaporate at
none of them
constant temperature
different temperature
same temperature
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Comment
Air and Atmosphere
Which of the following gas is more in percentage in the air?
Oxygen
Argon
Carbon dioxide
Nitrogen
Out of all the gases present in the air, nitrogen constitutes highest percentage of i.e. 78%.
Author:
rikazzz
Comment
Air and Atmosphere
Air is important on earth because it has necessary components essential for the life of
plants
animals
organism
plants, animals and other organisms
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