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Question
Give the principle and examples of the following.
Leaching
Short Answer
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Solution
Leaching is based on the selective dissolution of the ore in a suitable solvent, while the impurities remain undissolved.
Examples:
- Bauxite is leached with hot concentrated sodium hydroxide solution to extract aluminium.
- Gold and silver are extracted from their ores by leaching with sodium cyanide solution.
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Chapter 7: Metallurgy - EXERCISE [Page 158]
