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Giving appropriate examples (at least th...

Giving appropriate examples (at least three) explain how the reactivity of a mẹtal is related to its mode of occurrence in nature.

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Elements occur in nature either in tlie free state (native state) or in the combined state (in the form of compounds), because different élements have differeat chemical.reactivities. Highly reactive metals like sodium occur in combined state generally is .their chiorides, sulphates or calbonates. Moderately reactive metals like iron occur as theitroxides. Noble metals like Au occur in freè state ./. native -state.
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V PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-QUESTION BANK
  1. Give the different steps involved in metallurgy

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  2. Prudict the mode of occurrence of the following metals. (i) Highly rea...

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  3. Giving appropriate examples (at least three) explain how the reactivit...

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  4. Explain the terms-(1) Quenching (2) Annealing (3) Tempering

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  5. Name three metals.which occur in nature miainly as oxide ores. Name on...

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  6. What chemical principle is involved in choosing a reducing agent for g...

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  7. Describe the principle of extraction of each of the following (b) Zn ...

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  8. Discuss some of the factors, which need consideration before deciding ...

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  9. Which of the folllowing benefaction processes is used for the mineral ...

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  10. The impurities associated with the ore after mining are collectively c...

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  11. In which of the folllowing minerals, aluminium is not present?

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  12. The process in which metal oxide is reduced to metal by Al is called

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  13. During smelting, the additional substance added, which combines with i...

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  14. An ore after levigation is found to have acidic impurities. Which of t...

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  15. Which of the following metals is. ieached by cyanide process

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  16. Which of the following metals can be extracted by smelting

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  17. Alkalt metáls do not exist in free state in niature because. these are

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  18. Smelting involves reduction of metal oxide with

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  19. Heating pyrites to remove sulphur is called

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  20. Extraction of silver form 'Ag2 ~S' by the use of soidum cyanide is an ...

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