SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a homogeneous solution
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an element
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pure substance
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mixture
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Detailed explanation-1: -Elements and compounds are both examples of pure substances.
Detailed explanation-2: -A pure substance is that which contain one kind of molecule. They have fixed chemical formula. Like water is a pure substance with chemical formula H2O.
Detailed explanation-3: -Compounds are represented by chemical formulas.
Detailed explanation-4: -Examples of Pure Substances All elements are mostly pure substances. A few of them include gold, copper, oxygen, chlorine, diamond, etc. Compounds such as water, salt or crystals, baking soda amongst others are also grouped as pure substances.
Detailed explanation-5: -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.