Additional Questions With Solutions:
Ques: Name the various components of air.
Ans: Nitrogen 78%, Oxygen 21%, carbon dioxide, argon, and methane.
Ques: What is air pollution?
Ans: the contamination of air by impurities like smoke and poisonous gases which may have a harmful impact on the living and the non-living components, this is called air pollution.
Ques: What is pollutant? Name two such pollutants which are responsible for air pollution.
Ans: The substances which contaminate the air and water. These are called pollutants. Carbon dioxide and carbon monoxide.
Ques: Name the sources of air pollutants.
Ans: Factory, electric reactor, automobile vehicles, Fuels like coal and wood etc.
Ques: Name the element that is responsible for damaging of ozone layer.
Ans: Chlorofluro carbon (CFC).
Ques: What are the sources of Chlorofluro carbon (CFC)?
Ans: Chlorofluro carbon (CFC) are used in refrigerators, air conditioners and aerosole.
Ques: How is ozone layer useful for us?
Ans: Ozone layer prevents us to the ultraviolet rays coming from the sun.
Ques: Why are the ultraviolet rays harmful for us?
Ans: Ultraviolet rays carry radiations Which harm our body and cause various diseases like cancer and skin disorders.
Ques: What is acid rain?
Ans: The sulphur dioxide and nitrogen form sulphuric acid nitric acid react with moisture and water vapour in atmosphere. This is called acid rain.