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) $Fe_2 O_3$
(b) $Al_2 O_3$
(c) $PbO$
(d) $ZnO$
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Solution:
- (b) $Al_2 O_3$ cannot be reduced by carbon.
In Ellingham diagram, place of aluminium oxidation is much below than that of carbon. Thus, carbon cannot reduce $Al_2 O_3$ to Aluminium metal.
