All of the aforementioned are signs that a chemical reaction may have taken place in a piece of glass except: D. The shape of glass changes.
A chemical reaction can be defined as a chemical process that involves the continuous transformation (rearrangement) of the ionic, atomic or molecular structure of a chemical element by breaking down and forming chemical bonds, in order to produce a new chemical compound while new bonds are formed.
A chemical change can be defined as a type of chemical reaction that is typically characterized by a change in chemical composition and this leads to the formation of a new chemical substance.
This ultimately implies that, a chemical change would give rise to the chemical properties of matter by causing the transformation of one chemical substance into one or more different chemical substances.
In conclusion, all of the aforementioned are signs that a chemical reaction may have taken place in a piece of glass except that the shape of glass changes.
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