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Sulphide ores of metals are usually conc...

Sulphide ores of metals are usually concentrated by both floatation process. Which of the following sulphide ores offers an exception and is concentrated by chemical leaching ?

A

Galena

B

Copper pyrites

C

Sphalerite

D

Argentite

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Sulphide ores of metals are usually concentrated by forth floation proces. Which one of the following sulphide ores offers an exception and is conventrated by chemical leaching'

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AAKASH INSTITUTE-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Objective type Questions (One option is correct)
  1. Impure zince, as collected from earthen clay retort, is called

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  2. During smelting, an additional substance is added which combines with ...

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  3. Sulphide ores of metals are usually concentrated by both floatation pr...

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  4. Heating pyrities in air to remove sulphur is called

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  5. Extraction of zince from zinc blende is achieved by

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  6. Extraction of copper from copper pyrites is achieved by

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  7. Which of the following metals is purified by distillation process ?

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  8. The method of zone refining is based on the priniciple of

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  9. Which of the following is not a method of purification of metals ?

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  10. Zone refining is used as a method of purification of metals which are

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  11. Which of the following is not a use of aluminimum ?

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  12. Which of the following is not a use of zinc ?

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  13. Wrought iron is used for making

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  14. Which of the following metal can be reduced by carbon reduction as wel...

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  15. Purest form of iron is

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  16. The metal oxide which cannot be reduced to metal by carbon is

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  17. On heating a mixture of Cu(2)O and Cu(2)S, we get

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  18. Out of following which metal can be purified by Van Arkel method ?

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  19. Froth floatation process is based on

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  20. Ag(2)S+NaCNto(A), (A)+Znto(B)+Ag (A) and (B) are respectively

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