Question

chemical reactions: lab practice
casey coker
what evidence is there that a chemical reaction occurred?
multiple - choice question
what evidence is there that a chemical reaction occurred? select all that apply.
color change
light production
temperature change
gas formation
rewatch
ski

Explanation:

Chemical reactions can be identified by various observable changes. Color change is a common sign as new substances with different colors may form. Light production (like in combustion or some luminescent reactions) indicates a chemical change. Temperature change (either exothermic - releasing heat or endothermic - absorbing heat) shows energy transfer during a reaction. Gas formation (bubbles) is also a key indicator as it implies a new gaseous product.

Answer:

Color change, Light production, Temperature change, Gas formation