Iv) Rohan tore a sheet of paper into piecesand then burnt them. Identi

1.	Iv) Rohan tore a sheet of paper into piecesand then burnt them. Identify theirreversible change taking place in theprocess.(a) Tearing the sheet into pieces(b) Burning the pieces
Answer» Required ANSWER:- (a) Tearing the SHEET into pieces $:$ It is a kind of physical and irreversible change. It is because we can't reverse the PROCESS and get the FULL sheet of paper back. But it is still a paper, the chemical COMPOSITION hasn't changed. Only the physical property i.e. shape and size have changed. (b) Burning the pieces: It is a kind of chemical and irreversible change. It is because the chemical composition of the paper have changed. The paper is now changed into ashes. Also, we can't reverse the process and get the paper back.

Iv) Rohan tore a sheet of paper into piecesand then burnt them. Identify theirreversible change taking place in theprocess.(a) Tearing the sheet into pieces(b) Burning the pieces

Answer»

Required ANSWER:-

(a) Tearing the SHEET into pieces $:$

It is a kind of physical and irreversible change. It is because we can't reverse the PROCESS and get the FULL sheet of paper back. But it is still a paper, the chemical COMPOSITION hasn't changed. Only the physical property i.e. shape and size have changed.

(b) Burning the pieces:

It is a kind of chemical and irreversible change. It is because the chemical composition of the paper have changed. The paper is now changed into ashes. Also, we can't reverse the process and get the paper back.

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