Which of the following are not clues that a chemical reaction has taken place?

A. Steam
B. Formation of a gas
C. Change in color
D. Constant temperature

Question

Which of the following are not clues that a chemical reaction has taken place?

 		A.	Steam
 		B.	Formation of a gas
 		C.	Change in color
 		D.	Constant temperature

anonymous · Answer

It can be more than one I think D and A

jfraser · Answer

steam is $usually$ only formed when water absorbs energy and changes temperature enough to boil. Where did the water absorb the energy from?

anonymous · Answer

sorry am i right or wrong

joannablackwelder · Answer

Steam could be formed by just heating water, but often steam is formed when a reaction creates heat when water is present. So, it could indicate that a reaction has taken place, but it doesn't have to.