Chemical Combination, Decomposition, Displacement, Double Decomposition

    CHEMICAL COMBINATION:-

In a chemical combination two elements are compound always combines in definite ratio to form a larger compound.

    CHEMICAL DECOMPOSITION:-

 In a chemical decomposition always a larger compound divides under special conditions into smaller compound or elements.

    CHEMICAL DISPLACEMENT:-

 In a chemical displacement reaction the elements of higher reactivity will displace the elements of lower reactivity.

   CHEMICAL DOUBLE DECOMPOSITION:-

In the chemical change there will be the exchange of radicals between two compounds.