Question

Explain with examples three types of chemical changes .give an example for each

Answer 1

changes which are irreversible and a new substance is formed is known as chemical change
Ex-burning of paper

Answer 2

Combustion Decomposition Displacement ..........  ........... ......    ....... Combustion is a type of reaction in which heat and light are produce... C+O2 ->CO2+∆+light ...................    ..................... Decomposition reaction is when compound is get decompose by light ,heat, etc.... NaCl + electricity->Na+Cl ................................................. Displacement reaction is when 2 compound are added and they exchange their redicals is called displacement reaction CuSO4+Fe->FeSO4+Cu