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प्रश्न
Assertion: Hydrometallurgy involves dissolving the ore in a suitable reagent followed by precipitation by a more electropositive metal.
Reason: Copper is extracted by hydrometallurgy.
पर्याय
Both assertion and reason are true and reason is the correct explanation of assertion.
Both assertion and reason are true but reason is not the correct explanation of assertion.
Assertion is true but reason is false.
Assertion is false but reason is true.
Assertion and reason both are wrong.
उत्तर
Both assertion and reason are true but reason is not the correct explanation of assertion.
Explanation:
Copper is extracted by hydrometallurgical process. In this process, salts of metal are dissolved in suitable solvent like water and then reduced by more electropositive element.
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संबंधित प्रश्न
What is meant by the term “chromatography”?
Outline the principles behind the refining of metals by the following methods:
Chromatographic method
Name the method of refining which is Used to obtain semiconductor of high purity.
Give two requirements for vapour phase refining.
Match the items of Column I with the items of Column II and assign the correct code:
| Column I | Column II |
| (A) Coloured bands | (1) Zone refining |
| (B) Impure metal to volatile complex | (2) Fractional distillation |
| (C) Purification of Ge and Si | (3) Mond Process |
| (D) Purification of mercury | (4) Chromatography |
| (5) Liquation |
Assertion: Zirconium can be purificed by Van Arkel method.
Reason: ZrI4 is volatile and decomposes at 1800 K.
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Describe a method for refining nickel.
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