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When two substances are mixed together, a color change is observed. Does this mean that a chemical reaction has definitely occurred?
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When two substances are mixed together, a color change is observed. Does this mean that a chemical reaction has definitely occurred?

User Piotr Duda
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Answer:

No because some physical changes produce color changes.

User Sophie Sperner
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Nope, color change can also occur during a physical change. 
User Joshua Hunter
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