Which of the following changes gives no evidence that a chemical reaction has taken place? (1 point)

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

Question

Which of the following changes gives no evidence that a chemical reaction has taken place?  (1 point)

    A cube of solid forms a puddle of liquid.
    A certain liquid is added to a solid, and bubbles of gas form.
    Two liquids are mixed, and a precipitate forms.
    Heating a blue solid turns the solid white.

anonymous · Answer

Heating a blue solid turns the solid white

anonymous · Answer

really is that right idk on this

anonymous · Answer

Isnt it a chemistry question????

anonymous · Answer

I think so

anonymous · Answer

yes coz aq. Copper sulphate is blue but on gentle heating it turns white by losing water of crystallization. Wt do u think???

anonymous · Answer

A cube of solid forms a puddle of liquid.

anonymous · Answer

no get out of here you do not now what you are talking about you got it wrong stop saying answers that are not right