Question

For reduction of FeO at the temperature corresponding to point D, which following statements is correct

1. value for the overall reduction reaction with carbon monoxide is zero    
2. value for the overall reduction reaction with a mixture of 1 mole carbon 1 mole oxygen is positive    
3. value for the overall reduction reaction with a mixture of 2 mole carbon 1 mole oxygen will be positive    
4. value for the overall reduction reaction with carbon monoxide is negative