A chemical reaction does not involve:
Changing of the atoms of an element into those of another element to form new products.
The explanation for the correct answer:
(1) A chemical reaction is where the bonds within the reactant molecules are broken and new bonds are formed within the molecules of the product in order to form a new material.
(2) A chemical reaction is a mechanism that takes place when two or more molecules interact to produce new products.
(3) A reaction between two atoms or ions or molecules may take place and a new bond is formed and no atom is destroyed or created, but reactants form a new substance.
The explanation for the incorrect option:
Option A:
Option B:
Option C:
Therefore, the correct option is (D),i.e., A chemical reaction does not involve changing the atoms of an element into those of another element to form new products.