The chemical properties could be obtained by adding acid to the plastic to see if it reacts.
Chemical properties are those properties that could only be observe when a substance undergoes chemical change. In this case, a chemical change could also be called a chemical reaction.
A substance could be said to undergo a chemical reaction if there is a rearrangement of the atoms of the compound. This would ultimately lead to the formation of a new substance.
Now the forensic scientist wants to know the chemical properties of the plastic. This could be done by reacting the plastic with acid.
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