Question

define chemical reaction its various type with examplr

Answer 1

a reaction in which chemical properties of substances involved changes and a new product is formed then the reaction is known as chemical reaction.
a chemical reaction has taken place if there is
1.evolution of gas
2.change in temperature
3.change in colour
4.change in state
types of reaction :
1.combination reaction
ex:Mg+O=>MgO
2. decomposition reaction
ex:H2O(water)=>H2 +O2
3.displacement reaction
FeSO4+Cu=>CuSO4+Cu
4. double displacement reaction.
BaCl2+Na2SO4=>NaCl+BaSO4.

hope my answer helped you.