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JEE Main levelOne or more correct optionsDifficulty 2 of 3mt087

Which of the following reductions are used industrially for the oxide named?

  1. A reduced by zinc metal
  2. B reduced by in a blast furnace
  3. C reduced by coke at about 1673 K
  4. D reduced by aluminium

Answer: B, C, D

Iron(III) oxide is reduced by , chromium(III) oxide by Al and zinc oxide by coke near 1673 K. Zinc lies far above aluminium in oxide stability, so it cannot reduce .
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