No, it is NOT an indicator of a chemical reaction. Change in color IS an indicator of chemical change, though.
to indicate what the chemical is.
Starch is not the indicator. Iodine is the indicator of starch.
indicator
Yes, the indicator react with the solution.
A colour change in a chemical indicator implies that a distinguishable chemical property has been changed in the given system.
An indicator is use to detect the given object is acid or a base
no
precipitate
Neutral is a word that describes a chemical which turns a universal indicator green. This chemical has a pH equal to 7.0 on the pH scale.
That is a chemical change.
You may want to use iodine.