Question 1 (h)
Classify the following as chemical or physical changes:
h. Burning of paper and wood

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Solution

Recall the definition of physical and chemical change. If the chemical composition is changing then it is a chemical change and if the chemical composition remains same, then it is a physical change.
h. Burning of paper and wood - Chemical change

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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.

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