Is a slice of banana turning brown a chemical or physical change?

Answer 1

Yes, yes it is. Einstein, in his theory of relativity, stated that "Peeling a bannana IS a chemical change" Thus redefining the laws of physics.

Answer 2

Yes. As a banana ripens, a chemical process converts the starch into sugar. Just about everything in life can be explained as a chemical process because everything contains molecules, all of which undergo chemical processes.

Answer 3

banana turning black is a chemical reaction. This is because the phenols react with oxygen so it turns brown. to stop this from happening use lemon juice on your bananas and apples - the acidity kills the enzymes.

Answer 4

It is chemical.

It is due to a defense mechanism in the fruit, which is activated when the fruit is cut from the tree.

There are three main factors involved in the ripening and browning process, they are: enzymes, oxygen and phenols. Enzymes are protein-like substances that speed up or initiate chemical reactions. Phenols are defensive mechanisms the plant uses to fend off insects and microbes. The specific enzyme is called polyphenoloxidase. When the banana is attacked, the phenols are activated in the presence of oxygen by this enzyme. In this process the brown color is produced as a side effect. The first time the banana is attacked is when it is cut from the tree. Exposure to cold air, certain gases, and physical damage of the fruit will hasten the process.

Answer 5

It's practically rusting, except for bananas. The enzyme present in the banana, polyphenol oxidase, reacts with oxygen to change the color of the banana.

Answer 6

Yes it is a chemical change

Answer 7

chemical change

Answer 8

Physical change

Answer 9

yes