Which actions are evidence that a chemical reaction has occurred? check all that apply.
a: a change in color
b: the formation of a precipitate
c: a clear liquid becoming cloudy
d: a change in shape
e: the formation of bubbles
f: the formation of smoke

explanation:

a chemical change is a change in which atoms of one or more compounds rearrange themselves in order to form new compounds.

for example, formation of curd from milk is a chemical change.

a chemical change include following changes.

there are several aspects that shows the occurrence of a chemical reaction, these includes;

b.a device that inputs heat into a cool object

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