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प्रश्न
Which of the following metals is (are) obtained by leaching its (their) ore(s) with dilute cyanide solution?
पर्याय
Zinc
Aluminium
Silver
Gold
MCQ
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उत्तर
Silver, Gold
Explanation:
Silver and gold are obtained by leaching their ores with dilute cyanide solution in the presence of air (oxygen). This process forms a soluble metal cyanide complex from the metal.
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