Question

Which among the following is a physical change?

Cutting a log of wood in small pieces
Burning of wood
Ripening of fruit
Cooking of food

Answer 1

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Cutting of log of wood into small pieces is a physical change.

Explanation:

Cutting of log of wood into small pieces is a physical change because in physical change no new substance is produced or formed.

Answer 2

Explanation:

burning of wood-chemical change

because a new sudstance formed

wood +O2---> Ashes+CO2+∆+light

( haet)

whereas cutting into small pieces is a physical change because there is no change in the composition of the substance and no new substance is formed.

only the size is reduced.