Which of the following changes gives no evidence that a chemical reaction has taken place?

A. A cube of solid forms a puddle of liquid.
B. A certain liquid is added to a solid, and bubbles of gas form.
C. Two liquids are mixed, and a precipitate forms.
D. Heating a blue solid turns the solid white.

Question

Which of the following changes gives no evidence that a chemical reaction has taken place?  

A. A cube of solid forms a puddle of liquid.
B. A certain liquid is added to a solid, and bubbles of gas form.
C. Two liquids are mixed, and a precipitate forms.
D. Heating a blue solid turns the solid white.

anonymous · Answer

????????????
i think u r in the wrong place

anonymous · Answer

this is the math section

anonymous · Answer

This is the Math Category. But I think it's B.

anonymous · Answer

oops sorry >.< i posted to fast haha my bad