NEET BIOLOGY

Detailed explanation-1: -But if you take a bite of the cracker and begin chewing it, two things happen. The first is physical weathering, as your teeth break the cracker into smaller pieces. The second is a chemical change, as the saliva in your mouth mixes with the cracker pieces and begins to digest them.

Detailed explanation-2: -As the composition of the reactant and the state changes along with its physical properties and chemical properties, the explosion of crackers are considered as a chemical change.

Detailed explanation-3: -Burning of crackers is a chemical change because it produces new products with different properties. This chemical change also produces heat, light and smoke. Was this answer helpful?

Detailed explanation-4: -When we tear a piece of paper, we can see that the chemical content remains the same; only one thing that’s changed is the size of the paper bits that form as we tear the paper further. Its physical state has changed. As a result, tearing a piece of paper is an irreversible physical change.