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24 September, 06:53

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

- Yes because any change indicates a chemical reaction.

- No because some physical changes produce color changes.

- No because color changes are not indicators of chemical reactions.

- Yes because color changes occur only when new compounds are formed.

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  1. 24 September, 08:19
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    I believe the correct answer from the choices listed above is the third option. When two substances are mixed together, a color change is observed. This observation is not an enough evidence that there is a chemical reaction happening because color changes are not indicators of chemical reactions.
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