Zinc cannot be extracted from zinc oxide via CO reduction because:

(Given:  Ellingham diagram)

 

1.  \(\Delta G_{f}^{o} \) of Zn from ZnO is lower than that of CO2 from CO
2.  \(\Delta G_{f}^{o} \) of ZnO from Zn is lower than that of CO2 from CO
3. ZnO is less stable than CO
4. ZnO is more stable than CO

Subtopic:  Ellingham Diagram |
 56%
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The better reducing agent for ZnO is: 

1. C

2. CO

3. CO2

4. CO32-

Subtopic:  Ellingham Diagram |
 60%
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Al can reduce MgO under the following conditions:

1. Above 500 °C, Al can reduce MgO

2. Below 500 °C, Al can reduce MgO

3. Below 1350 °C, Al can reduce MgO

4. Above 1350 °C, Al can reduce MgO

Subtopic:  Ellingham Diagram |
 70%
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The thermodynamic property useful for selecting the reducing agent is:

1. Gibbs free energy change .

2. Internal energy change.

3. Specific heat capacity.

4. None of the above.

Subtopic:  Ellingham Diagram |
 94%
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