Which of the following indicates a chemical reaction?
Mark all that apply
A: rotten egg odor was detected
B: purple color was observed when a red solution and a blue solution were mixed
C: blue precipitate was observed
D: a green color was observed when colorless solutions were mixed
Will medal!!

Question

Which of the following indicates a chemical reaction?
Mark all that apply 
A: rotten egg odor was detected 
B: purple color was observed when a red solution and a blue solution were mixed
C: blue precipitate was observed 
D: a green color was observed when colorless solutions were mixed 
Will medal!!

ggray · Answer

does anybody know this?

ggray · Answer

@Nnesha 
@reneezerichter 
do you guys know this?

anonymous · Answer

I would say that 
All of these apply. Changes in color state, The rotten egg smell is  common when some solids are heated.