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Chemistry 7 Online
OpenStudy (anonymous):

Color change is a good way to detect a chemical reaction. True False

OpenStudy (joannablackwelder):

This is typically true, but not always. See http://chemwiki.ucdavis.edu/Analytical_Chemistry/Qualitative_Analysis/Chemical_Change_vs._Physical_Change

OpenStudy (jfraser):

generally true, as @JoannaBlackwelder says

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