SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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physical intensive property
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physical extensive property
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chemical change
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Physical change
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Detailed explanation-1: -The burning of wood is a chemical change as it leads to the formation of new substances like Carbon dioxide gas, water vapour, ash, etc. There are some substances that do not undergo complete combustion or do not react at all, these substances form the fire ash.
Detailed explanation-2: -Cutting of wood into small pieces is a irreversible physical change as no new substance is formed and there is no change in chemical composition of wood. Whereas, burning of wood is a chemical change as a new substance is formed.
Detailed explanation-3: -Burning wood is an example of a chemical reaction in which wood in the presence of heat and oxygen is transformed into carbon dioxide, water vapour, and ash.
Detailed explanation-4: -The process of burning (as opposed to evaporating) is a chemical reaction, a chemical change.