Respuesta :

1. color change: the substance will change in colour
2. Change in temperature
3. Noticeable change in odour
4. formation of precipitate
5. formation of bubbles
6.Emission of light
7.Formation of a gas.
anabeld8

Answer:

formation of a gas

formation of a precipitate

color change

temperature change

production of light

Explanation:

just got it right on edg.

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