Explain why burning of wood and cutting it into small pieces are considered as two different types of changes.

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Solution

● Cutting of wood into smaller pieces does not lead to formation of any new substance so it is physical change.

● Burning of woods leads to formation of new substances such as carbon dioxide and substances like ashes. As new substances are formed, so it is a chemical change.

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Q. Classify the two changes given below. Change I: Cutting a log of wood into pieces Change II: Burning a log of wood

Q. Which of the following are physical changes and which are chemical changes ?
Burning of candle wax, Melting of candle wax, Mixing of iron filings and sand, Burning of wood, Breaking a piece of chalk, Burning a piece of paper, Cutting a piece of paper.

Q. Can the cutting of wood be represented as physical change and burning of wood as chemical change?

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Standard VIII Chemistry

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Explain why burning of wood and cutting it into small pieces are considered as two different types of changes.​

● Cutting of wood into smaller pieces does not lead to formation of any new substance so it is physical change.​ ​ ● Burning of woods leads to formation of new substances such as carbon dioxide and substances like ashes. As new substances are formed, so it is a chemical change. ​ ​

Explain why burning of wood and cutting it into small pieces are considered as two different types of changes.

● Cutting of wood into smaller pieces does not lead to formation of any new substance so it is physical change.

● Burning of woods leads to formation of new substances such as carbon dioxide and substances like ashes. As new substances are formed, so it is a chemical change.