Question

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TIME REMAINING
16:33:17
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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Answer 1

answer:

a. yes, because any change indicates a chemical reaction


since the question is discussing chemical reactions, not physical changes, a color change would be an indicator that a reaction is occurring.

Answer 2

no because some physical changes produce color changes