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

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Solution

Physical changes:
Physical changes are those charges which lead to the difference in physical appearance like size, shape, mass, volume, etc.
Physical changes are mostly irreversible in nature.
Chemical changes:
Chemical changes are those changes that are the results of changes in the chemical composition of the substance.
It involves breaking and making bonds.
Changes observed in the cutting of wood and burning of wood:
The burning of wood is a chemical change as after burning wood changes into ash.
Cutting wood into small pieces is a physical change as it involves a change in the size of wood.
Hence, burning wood and cutting it into small pieces are considered two different types of changes.

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Similar questions

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.

Question 16

Classify the following processes into physical or chemical changes:

(i) Beating of aluminium metal to make aluminium foil.
(ii) Digestion of food.
(iii) Cutting of a log of wood into pieces.
(iv) Burning of crackers.

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

Cutting of wooden logs into small pieces and burning are considered as two different types of changes.

(a) A magnesium ribbon is taken and burnt. The ash is then dissolved in water. Name the various products formed. Support your answer with reactions.

(b) Burning of wood and cutting it into small pieces are considered as two different types of changes. Explain.
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