Question

Isha was cutting some apples but in the middle of it Harry took her to play volleyball. After coming back she saw a brown coating over the apple slices. This formation of brown coating is which kind of change?

• A. Physical change
• B. Chemical change
• C. Reversible change
• D. Irreversible change

Answer 1

Answer: (B), (D)

Irreversible change

Leaving sliced apple in open for some time results into brown coating because apples are exposed to oxygen present in the air. This action damage the cells of the fruit, allowing oxygen in the air to react with the enzymes and other chemicals present in the apple. Thus, the chemical properties of layer changes. Hence, it is a chemical change. This process can't be reversed and thus it is an irreversible process.