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A mixture of Al(2) O(3) and Fe(2) O(3) c...

A mixture of `Al_(2) O_(3) and Fe_(2) O_(3)` can be separa-ted by using

A

Sodium hydroxide

B

Cold water

C

Ethyl alcohol

D

Boiling water

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The correct Answer is:
A
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AAKASH SERIES-PRINCIPLES OF METALLURGY-Objective exercise -2 (Extraction of some metals)
  1. Which of following metal oxide (s) can be reduced to the corresponding...

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  2. Formation of metallic copper from the sulphide ore in the normal therm...

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  3. A mixture of Al(2) O(3) and Fe(2) O(3) can be separa-ted by using

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  4. Percentages of copper and zinc present in a alloy brass, are respectiv...

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  5. In the blast furnace, the reaction that is taking place at the tempera...

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  6. Metal used in the extraction of Mn and Cr from their oxides is

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  7. Impurity present in red bauxite is

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  8. Metal extracted from molten cryolite is

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  9. From the below Ellingham diagram, incorrect statement among the follo...

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  10. Metal extracted only by electrolysis process is

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  11. Heating mixture of Cu(2) O and Cu(2) S will give

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  12. Metal that can be extracted by eletrolysis of its salt even from aqueo...

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  13. The final step in the metallurgical extraction of Cu metal from Cu pyr...

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  14. The process of bringing the metal or its ore into solution by the acti...

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  15. Exothermic reaction among the following is A) Cr(2) O(3) + 2All to...

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  16. In the extraction of silver from argentite are the one is treated with...

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  17. Which of the following reagent is used to separate the impurity from r...

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  18. The metal iron obtained for the last furnace contains X' percent of ca...

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  19. Ag(2) S + 4 NaCN to 2X + Na(2) S Incorrect statement about 'X' is

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  20. Regarding the electrolysis of Alunina, the correct statements A) Cr...

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