Question

2. Now burn the paper. What change do you see? Answer:​

Answer 1

When a paper is burnt, the molecules of paper undergo change forming new substances like smoke and water vapour. The change here is irreversible. So, a burnt piece of paper cannot be brought back to its original form.

Answer 2

Answer:

We see that paper changes to ash...So it is defined As Chemical Change 1.New substances frormed.2.Cannot Reversed.And these properties are used in the above statement.

Hope it helps