Question

what changes do we observe when a chemical reaction occur ​

Answer 1

Answer:

Some changes are:

1.Evolution of a gas

2. Change in colour

3. Change in state

4. Formation of a precipitate

hope it HELPS.

please follow me.

Answer 2

Answer:

Here's your answer.

Explanation:

Changes occur during chemical reaction are as follows :--

1) change in colour

2) odour

3) it may change it's state of being.

4) evolution of gasses

5) formation of precipitate.

I hope it might help you.

THANK YOU.