Chemical Reaction- PowerPoint Presentation, Science, Class X - Class 10 PDF Download

 Page 2


? A chemical change is a change in which a new 
substance is formed and every chemical change is a 
chemical reaction.
Evidence Of Chemical Reaction
? Release of energy as heat and light
? Change in Colour
? Evolution of Gas
? Change in Odour
? Change in State
Page 3


? A chemical change is a change in which a new 
substance is formed and every chemical change is a 
chemical reaction.
Evidence Of Chemical Reaction
? Release of energy as heat and light
? Change in Colour
? Evolution of Gas
? Change in Odour
? Change in State
Types Of Chemical Reactions
1.   Combination Reaction: A + B ? C
2.   Decomposition Reaction: AB  ? A + B
3.    Displacement Reaction: AB + C  ? AC + B
4.    Double Displacement Reaction: 
AB + CD  ? AC + BD
5.    Oxidation Reaction
6.    Reduction Reaction
Page 4


? A chemical change is a change in which a new 
substance is formed and every chemical change is a 
chemical reaction.
Evidence Of Chemical Reaction
? Release of energy as heat and light
? Change in Colour
? Evolution of Gas
? Change in Odour
? Change in State
Types Of Chemical Reactions
1.   Combination Reaction: A + B ? C
2.   Decomposition Reaction: AB  ? A + B
3.    Displacement Reaction: AB + C  ? AC + B
4.    Double Displacement Reaction: 
AB + CD  ? AC + BD
5.    Oxidation Reaction
6.    Reduction Reaction
Combination Reaction
2Mg(s) + O
2
(g) ? 2MgO(s)+ Heat + Light
Mg
Mg
O O
+ ?
Mg
Mg
O O
Page 5


? A chemical change is a change in which a new 
substance is formed and every chemical change is a 
chemical reaction.
Evidence Of Chemical Reaction
? Release of energy as heat and light
? Change in Colour
? Evolution of Gas
? Change in Odour
? Change in State
Types Of Chemical Reactions
1.   Combination Reaction: A + B ? C
2.   Decomposition Reaction: AB  ? A + B
3.    Displacement Reaction: AB + C  ? AC + B
4.    Double Displacement Reaction: 
AB + CD  ? AC + BD
5.    Oxidation Reaction
6.    Reduction Reaction
Combination Reaction
2Mg(s) + O
2
(g) ? 2MgO(s)+ Heat + Light
Mg
Mg
O O
+ ?
Mg
Mg
O O
Decomposition Reaction/ Electrolysis
H
2
O
H
+
+ OH
-
At Anode: 
OH
-
- e
-
?OH
4OH ? 2H
2
O + O
2
At Cathode: 
H
+
+ e
-
? H
H  + H ? H
2