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IN 8TH CLASS
DAV (MOIL PUBLIC SCHOOL)
QUESTIONS
SCIENCE
Q.1)WHAT IS MEAN BY CHLOROFLUOROCARBONS (CFCs)?
Q.2) WHAT IS SMOG?
Q3) WHAT IS NITROGEN DIOXIDE?
Q4)WHAT IS ACID RAIN?
ANS IN SIMPLE WORDS.
[tex]follow \: me \: plzzz[/tex]
ANS I WILL FOLLOW YOU
IN 8TH CLASS
DAV (MOIL PUBLIC SCHOOL)
QUESTIONS
SCIENCE
Q.1)WHAT IS MEAN BY CHLOROFLUOROCARBONS (CFCs)?
Q.2) WHAT IS SMOG?
Q3) WHAT IS NITROGEN DIOXIDE?
Q4)WHAT IS ACID RAIN?
ANS IN SIMPLE WORDS.
[tex]follow \: me \: plzzz[/tex]
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Answers & Comments
1) any of several simple gaseous compounds that contain carbon, chlorine, fluorine, and sometimes hydrogen, that are used as refrigerants, cleaning solvents, and aerosol propellants and in the manufacture of plastic foams, and that are believed to be a major cause of stratospheric ozone depletion
2)smog means fog or haze intensified by smoke or other atmospheric pollutants.
3)a reddish-brown poisonous gas formed when many metals dissolve in nitric acid.
4)Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it has elevated levels of hydrogen ions. It can have harmful effects on plants, aquatic animals and infrastructure.
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