SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It created a new substance with new properties
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It changes in size
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There is a lot of smoke
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The logs get smaller
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Detailed explanation-1: -When wood is set on fire, the Carbon present in the form of Methane or butane combusts in the presence of Oxygen to form water and Carbon dioxide. 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.
Detailed explanation-2: -Burning is a chemical change as new substance is formed with new properties and it cannot be reversed.
Detailed explanation-3: -Burning is a chemical change. This is because, new substances (e.g. ash and carbon dioxide CO2) are formed during burning.
Detailed explanation-4: -When you look at flames, you are seeing the results of a complex chemical reaction called pyrolysis. You’re seeing wood turned into gas, gas ignited by heat, and light from the excitement of electrons.
Detailed explanation-5: -The burning of wood leads to the formation of new substances like ash(carbon), carbon dioxide gas, water vapour, heat and light. This change is irreversible and hence a chemical change.