From the Ellingham graph between Gibbs energy and temperature , out of – InterviewSolution

1.	From the Ellingham graph between Gibbs energy and temperature , out of C and CO which is a better reducing agent for ZnO ?
Answer» Carbon CO Both of these None of these Solution :The free ENERGY of formation `(DeltaG^(@))` of CO from C becomes lower at temperature above 1180 K whereas that of `CO_(2)` from C becomes lower aboveb1270 K than `DeltaG^(@)` of ZnO. However , `DeltaG^(@)` of `CO_(2)` fromCO is always HIGHER than that of ZnO. Hence, C can reduce ZnO to ZN but not CO.

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