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A

Purification of Al metal : Baeyer's method

B

Polling: Reduction of `Cu_2 O`

C

`FeCr_2O_4` (chromite ore) :` NaOH// Na_2 CO_3`

D

Ag : Mac Arthur cyanide process

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The correct Answer is:
A
Purification of Al metal : Baeyer.s method
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DISHA PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE -1: CONCEPT BUILDER (TOPICWISE)
  1. Method used for obtaining highly pure silicon which is used as a semic...

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  2. In the purification of impure nickel by Mond's process, metal is purif...

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  3. Incorrect match

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  4. In van Arkel method, if I(2) is introduced at 1700 K over impure metal...

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  5. Van Arkel method of purification of metals involves converting the met...

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  6. Identify the reaction that does not take place in a blast furnace

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  7. The temperature (""^@C) at which Fe2 O3is finally reduced to Fe in the...

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  8. High purity copper is obtained by

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  9. Iron is obtained on a large scale from Fe2O3 by

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  10. Which of the following metals is obtained by electrolytic reduction pr...

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  11. In the extractionof iron, slag is produced. Slag is

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  12. Thomas slag is

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  13. Which of the following pairs of metals uis purified by van arkel meth...

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  14. Which of the following metals is extracted by the electrometallurgical...

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  15. The electrolytic reduction technique is used in the extraction of

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  16. Nickel is purified by thermal decomposition of its

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  17. In the electrolysis of alumina, cryolite is added to

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  18. (viii) Amongest the following groups of oxides, the group containing o...

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  19. The phenomenon of removing layers of basic oxides from metals before e...

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  20. which of the following electronts is present as the impurity to the m...

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