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Grade: 7
        
 
MEANING OF TERMS :- 
 
PHOTOCHEMICAL SMOG 
FREONS                                                                              FERROCENE  
 
 
8 days ago

Answers : (2)

Saurabh Koranglekar
askIITians Faculty
8369 Points
							The word smog is derived from smoke and fog. This is the most common example of air pollution that occurs in many cities throughout the world.

There are two types of smog:
(a) Classical smog occurs in cool humid climate. It is a mixture of smoke, fog and sulphur dioxide. Chemically it is a reducing mixture and so it is also called as reducing smog.
(b) Photochemical smog occurs in warm, dry and sunny climate. The main components of the photochemical smog result from the action of sunlight on unsaturated hydrocarbons and nitrogen oxides produced by automobiles and factories. Photochemical smog has high concentration of oxidising agents and is, therefore, called as oxidising smog.

8 days ago
Vikas TU
11682 Points
							
Ferrocene is an organometallic compound with the formula Fe(C. 5H. 5) 2. The molecule consists of two cyclopentadienyl rings bound on opposite sides of a central iron atom.
8 days ago
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