a food item that is left out of the refrigerator turns brown and forms bubbles and gas. what are the signs…

a food item that is left out of the refrigerator turns brown and forms bubbles and gas. what are the signs that this is a chemical reaction? check all that apply.\nheat is produced.\nheat is absorbed.\nbubbles appear.\na precipitate forms.\nthe color changes.

a food item that is left out of the refrigerator turns brown and forms bubbles and gas. what are the signs that this is a chemical reaction? check all that apply.\nheat is produced.\nheat is absorbed.\nbubbles appear.\na precipitate forms.\nthe color changes.

Answer

Brief Explanations:

Color change and formation of bubbles (indicating gas production) are common signs of a chemical reaction. There is no information suggesting heat production/absorption or precipitate formation here.

Answer:

C. Bubbles appear, E. The color changes