1.

Out of C and CO, which is better reducing agent for ZnO?

Answer» The two reduction reactions are :
`ZnO(s)+C(s) to Zn(s)+CO(g)`
`ZnO(s)+CO(g)to Zn(s)+CO_(2)(g)`
In the first case, there is increase in the magnitude of `DeltaS^(@)` while in the second case, it almost remains the same. In other words, `DeltaG^(@)` will have more negative value in the first case when C(s) is a better reducing agent.


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