Question

Which of the following is a clue of a chemical change?
A. iron changes color when heated
B. gas bubbles form in boiling water
C. balls of wax form when melted wax is poured into ice water
D. a gas forms when vinegar and baking soda are mixed



would it be a

Answer 1

I think C or D is correct

Answer 2

it has to be a change

Answer 3

cameron y did u blok me

Answer 4

D is the correct answer because when the iron is heated it becomes red but when it becomes cold it become same as before there is no chemical change just only change of physical apperence

Answer 5

should be D. the others are physical changes.