Question

give one small example each of displacement decomposition and combination reaction with explanation

Answer 1

Displacement reaction- Those reaction in which one element takes the place on another element in a compound,are known as displacement reaction.

CuSO4 +Fe- FeSO4 +Cu

In this reaction, iron displaces copper from copper sulphate solution.

Combination reaction-Those reaction in which two or more substances combine to form a single substance are called combination reaction.

Hydrogen burns in oxygen to form water.

2H2 + O2 - 2H2O

In this reaction ,two elements, hydrogen and oxygen are combining to form a single,water.

Answer 2

Combination teaction means when two smaller atom combine to a single larger atom.                                               Ex:2H2+O2»2H2O.                                    Decomposition teaction means when a larger atom split into two or more smaller atom.                                           Ex:CaCO3»CaO+CO2