Define impurties
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Impurities are unwanted or foreign substances that are present in a material or substance, usually in small amounts and can affect its quality or performance. They can be natural or man-made and may come from various sources such as environmental contaminants, manufacturing processes, or even human or animal waste. In chemistry, impurities are any substances that are not the primary component of a compound or mixture and can cause a change in its physical or chemical properties.