Explain how the following changes are identified as chemical or physical changes?
Burning of wood
Cutting of wood
Conversion of steam to water
Rusting of almirah
Burning of wood - Chemical change ‐The chemical composition of wood changes.
Cutting of wood - Physical change - The chemical composition remains the same, only the size of the wood changes.
Conversion of steam to water- Physical change - No change in chemical nature of the substance.
Rusting of almirah- Chemical change ‐ Iron present in almirah converts into iron oxide (new compound) due to the presence of moisture.