Question

Which of the following is an indicator that a chemical reaction occurred?

A precipitate is formed
The state of matter changed
It was melted
The identity of the substance did not change​

Answer 1

the state of matter changed

Step-by-step explanation:

Answer 2

A) A precipitate is formed

Step-by-step explanation:

occurs in aqueous solution when two ions bond together to form an insoluble salt, which is known as the precipitate.