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The electrolytic solution used for extra...

The electrolytic solution used for extraction of `Al` in Hall Heroult method is

A

`Al_(2)O_(3)*H_(2)O`

B

`Al_(2)O_(3)+Na_(3)AlF_(6)`

C

`Al_(2)O_(3)`

D

`Al_(2)O_(3)*2H_(2)O+C`

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AAKASH INSTITUTE ENGLISH-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-Objective type Questions (One option is correct)
  1. Heating pyrites to remove sulphur is called

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  2. The process of converting hydrated alumina into anhydrous alumina is c...

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  3. The electrolytic solution used for extraction of Al in Hall Heroult me...

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  4. The extraction of zinc from zinc blende is achieved by :

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  5. Given below are the steps for extraction of copper from its ore. Write...

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

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  7. Vapour phase refining can be carried out in case of

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  8. Zone refining is based on the principle that .

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

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  10. Assertion: Zone refining method is used to produce pure metals which a...

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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 followed metals can be extracted by using carbon reductio...

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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. Which of the following pairs of metals is purified by van-Arkel method...

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  19. State briefly the principles which serve as basis for the following op...

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  20. In zone refining methods, the molten zone

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