The metallic aluminium is obtained from pure alumina in the presence of fused cryolite by

A. Electrolysis

B. Electrolytic reduction

C. Electrolytic oxidation

D. None of these


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  3. Wax is a
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  5. Kopper-Totzek coal gasifier
  6. Favourable conditions for the liquefaction of gases in general are
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  9. Vanillin is a type of
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  13. Pick out the wrong statement.
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  16. Production of one ton of dry paper pulp requires about __________ tons of bamboo or wood.
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  19. __________ Nature of hypo (sodium thiosulphate) makes it useful in photography.
  20. Reaction of ethylene glycol and dimethyl terephthalate (DMT) produces
  21. Sudden temperature fluctuation does not affect pyrex glass, because of its
  22. __________ acid is the main constituent of cotton seed oil.
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  24. Chalcopyrite is the main ore of
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