General Principles and Processes of Isolation of Elements - Result Question 15

####15. The metal oxide which cannot be reduced to metal by carbon is

[NEET Kar. 2013]

(a) Fe2O3

(b) Al2O3

(c) PbO

(d) ZnO

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Solution:

  1. (b) Al2O3 cannot be reduced by carbon.

In Ellingham diagram, place of aluminium oxidation is much below than that of carbon. Thus, carbon cannot reduce Al2O3 to Aluminium metal.



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