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‘Na' metal is prepared from fused NaCl b...

‘Na' metal is prepared from fused NaCl by

A

`1`. Reduction with carbon

B

`2`. Reduction with CO

C

`3`. Electrolytic reduction

D

`4`. All the above

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VGS PUBLICATION-BRILLIANT-PRINCIPLES OF METALLURGY-EXERCISE
  1. Method of extraction of metal from purified ore depends on

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  2. More active metals are not obtained from their ores by simple reductio...

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  3. ‘Na' metal is prepared from fused NaCl by

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  4. Which combination is wrong for the extraction of sodium metal from fus...

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  5. Which of the following step is not involved in the extraction of Ag ?

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  6. Which of the following impurities are present in a metal after reducti...

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  7. The selection of process of purification of a metal depends on:

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  8. Liquation is used for purification of metal if:

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  9. Chemically rust is a

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  10. When an Iron object is painted, the process of corrosion is reduced du...

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  11. The furnaces in which there is no direct contact between the hearth an...

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  12. Active metals are not extracted by the electrolysis or aqueous electro...

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  13. Which of the following is wrong?

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  14. Which of the following is correct about calcination ?

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  15. Which of the following is true about preparation of Iron by smelting p...

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  16. Which of the following is true about the electrolytic refining of meta...

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  17. Aluminium is more reactive than Iron, but rate of corrosion in Iron is...

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  18. Which of the following method is used for purification of metals conta...

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  19. The electrolyte used in refinery of copper is

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  20. The main use of CaCl2 in laboratory is

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