Chemical reaction is a process in which the chemical identity of initial substance get Changed. Explain the statement with the help of example

Dear Student,

Chemical reaction is a process in which the Chemical identity of initial substance gets changed.
This means that during a chemical reaction, reactants react to form a product such that the Product has entirely different properties than that of the Reactants.

For example,
Hydrogen reacts with oxygen to from water. The water thus formed has entirely different properties than that of hydrogen and oxygen.

Regards

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chemical reaction is process in which only rearrangement of atoms of elements takes place.
in reaction reactants changes to product
ex    2 Mg   +   o2  =   2MgO
HERE    mg and o2 is reactants
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