1. Combination reaction
Definition:
a reaction in which two or more reactants
combined to form a single compound is known as combination reaction.
Example: h2 + O2 =
2H2O
C + 202
= 2CO2
2. DECOMPOSITION REACTION
DEFINITION:
A REACTION IN WHICH A SINGLE REACTANT IS
DECOMPOSED TO FORM TWO OR MORE THAN TWO PRODUCT IS KNOWN AS DECOMPOSITION
REACTION.
EXAMPLE: 2H2O = H2 +
O2
Caco3 = cao
+ h2o
THERE ARE THREE TYPES OF
DECOMPOSITION reaction:-
A. thermolytic decomposition
reaction
Definition: a reaction in which a single compound
decomposes with the help of heat energy is known as thermolytic decomposition reaction.
Example: caco3 = cao + h2o
Pb(no3)2 = 2pbo + 4no2 + o2
B. Electrolysis decomposition reaction
Definition: the reaction in which a single compound is decomposes into two or more products is
known as electrolytic decomposition reaction.
Example: 2h2o = 2h2 + o2
2nacl = Na + cl2
C. Photolytic decomposition reaction
Definition: a reaction in which a single reactant is
decomposes into two or more product is known as photolytic decomposition
reaction.
Example: 2agcl = 2ag + cl2
2agbr = 2ag + br2
3. Displacement reaction
Definition: a reaction in which a highly reactive metal
displaces a low reactive metal from its compound is known as Displacement
reaction .
Example: Zn + hcl = zncl2 + h2
Fe + cuso4 = feso4 + cu
There are two types of displacement reaction
a. single displacement
reaction
same as
displacement reaction
b. Double displacement reaction
DEFINITION: REACTION INVOLVES EXCHANGE OF IONS BETWEEN THE
REACTANTS IS CALLED DOUBLE DISPLACEMENT REACTION.
EXAMPLE: BaCL2 + CUSO4 = BaSO4 + CUCL2
Cuso4 + h2s = h2so4 + cus
