Air and its Components
Air and its Components: Overview
This Topic covers sub-topics such as Photosynthesis, Atmosphere, Respiration, Composition of Air, Combustion Reaction, Uses of Nitrogen, Uses of Helium, Uses of Neon, Uses of Carbon dioxide, Uses of Argon, Uses of Xenon and, Reaction of Metals with Oxygen
Important Questions on Air and its Components
Helium is unreactive gas with a high specific heat capacity suggest a possible use of helium based on this information
Read the statements carefully and select the group mentioning incorrect statements:
(i) is a greenhouse gas.
(ii) Water is a non-polar solvent.
(iii) Major components of air are and .
(iv) The thinnest layer of the atmosphere is the troposphere.
Explain role of water vapour in modifying the earth's climate.
"Although carbon dioxide plays no role in respiration, all life would come to an end if there is no carbon dioxide in air". Support this statement with relevant facts.
What is the percentage proportion of oxygen in air ? Why is oxygen called active air ?
Explain significance of nitrogen for plants and animals.
The _____ is the lowest layer of the atmosphere.
Xenon is used in Flash lamps and in Stroboscopic lamps.
Xenon gas is used in observation ballons.
In the presence of _____ and sunlight plants prepare their own food.
Carbon dioxide and water combine to form glucose and _____.
The gas released during photosynthesis:
_____ combines with oxygen to form carbon dioxide water and energy.
Phosphorous reacts with sufficient supply of _____ to form phosphorous pent oxide.
Phosphorous pent oxide is formed when phosphorous is reacted in a limited supply of oxygen.
