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i. Physical properties :
These are properties which can be measured or observed without changing the identity or the composition of the substance.
e.g. Colour, odour, melting point, boiling point, density, etc.
ii. Chemical properties :
These are properties in which substances undergo change in chemical composition.
e.g. Coal bums in air to produce carbon dioxide, magnesium wire bums in air in the presence of oxygen to form magnesium oxide, etc.
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