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Which of the following reactions is an e...

Which of the following reactions is an example of auto reduction ?

A

`Fe_3O_4+4 CO rarr 3Fe+ 4CO_2`

B

`Cu_2O+ C rarr 2Cu + CO`

C

`Cu^(2+)(aq)+ Fe (s) rarr Cu (s) + Fe^(2+) (aq)`

D

`Cu_2O+1/2 Cu_2S rarr 3Cu+ 1/2 SO_2`

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MODERN PUBLICATION-GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS-EXERCISE
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  2. When copper ore is mixed with silica, in a reverberatory furnace coppe...

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  3. Which of the following reactions is an example of auto reduction ?

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  4. A number of elements are available in earth’s crust but most abundant ...

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  5. Zone refining is based on the principle that .

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  6. In the extraction of copper from its sulphide ore, the metal is formed...

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  7. During the electrolysis of NaCl solution, the gas liberated at the ano...

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  8. An ore of aluminium is

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  9. Electrolytic refining is used to purify which of the following metals ...

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  10. Extraction of gold and silver involves leaching the metal with CN^- io...

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  11. Answer the question on the basis of figure given below : Choose th...

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  12. Answer the question on the basis of figure given below : Below poi...

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  13. Answer the question on the basis of figure given below : For the r...

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  14. In the following questions two or more options may be correct. At the ...

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  15. In the following questions two or more options may be correct. Which o...

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  16. In the extraction of aluminium by Hall-Heroult process, purified Al2O3...

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  17. Which of the following statements is correct ?

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  18. In the Froth Floatation process, zinc sulphide and lead sulphide can b...

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  19. Common impurities present in bauxite are .

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  20. Which of the following ores are concentrated by froth floation ?

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