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Zivojin Milutinovic · Answer 1 · 2023-11-29T10:57:27+0000

Answer: it is chemical reactions

Step-by-step explanation:

We know there must be at least 2 signs of a signs list for it to be a chemical reaction.
1st sign is the color change
2nd The sign is the produce of odor

So this is a chemical reaction

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