Question

Answer the following questions in detail.
1. Give examples of two changes which are physical but irreversible. How can you say that these
are physical changes?​

Answer 1

1)when we burn a paper there is a physical change because there is no change in its chemical property but it is irreversible because we can't turn the ash in to paper.

2)when we write with chalk it breaks into small particles as there is no change in its chemical properties it is a physical change but as we can't turn it back it into a chalk it is a irreversible change.

Explanation:

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