Write any two observations in an activity which may Suggest that a chemical reaction has taken place.Give an example in support of your answer.

Write any two observations in an activity which may Suggest that a c

1.	Write any two observations in an activity which may Suggest that a chemical reaction has taken place.Give an example in support of your answer.
Answer» lution of gas. For EXAMPLE: When sodium carbonate reacts with dilute hydrochloric acid, carbon dioxide gas is evolved. (II) Formation of a precipitate. For example: When POTASSIUM iodide SOLUTION is added to a solution of lead nitrate, YELLOW precipitate of lead iodide is formed