What do you understand by a pure substance ? Give one example .
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A pure substance consists of a single type of particle . The components of a pure substance cannot be separated by physical methods.
example : Sugar
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A substance that has a fixed chemical composition throughout is called a pure substance such as water, air, and nitrogen. A pure substance does not have to be of a single element or compound.
Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances.
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