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प्रश्न
What is meant by the 'concentration of ore'?
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उत्तर
An ore usually contains some undesired impurities like sand, mud, rocky substances etc. that are present with the metal. These impurities are called gangue. These impurities are required to be removed before extracting the metal from its ore. Several physical and chemical methods are used to remove these gangue substances from the ore. This process of removing gangue substances from the ore to enhance the concentration (percentage) of metal is called the concentration of the ore.
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