Given below are two statements: 

Assertion (A): Magnesium metal is not used for the reduction of alumina in the metallurgy of aluminum
Reason (R): Magnesium can reduce alumina. But the process will be uneconomical.

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.
 



 

Subtopic:  Ellingham Diagram |
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Given below are two statements:

I: The Ellingham diagram provides an idea about the feasibility of a reaction.
II: The Ellingham diagram explains the rate of the reduction reactions.

In light of the above statements, choose the most appropriate answer from the options given below: 

1. I is correct and II is incorrect.
2. I is incorrect and II is correct.
3. Both I and II are correct.
4. Both I and II are incorrect.
Subtopic:  Ellingham Diagram |
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Consider the Ellingham diagram given below.

  

The Y-axis, and X-axis in the graph are respectively:

1. Gibbs energy(\(\Delta G_{r}^{o} \)), and Pressure
2. Gibbs energy (\(\Delta G_{r}^{o} \)), and temperature
3. Enthalpy(\(\Delta H_{r}^{o} \)), and temperature
4. Temperature, and Gibbs energy (\(\Delta H_{r}^{o} \)

Subtopic:  Ellingham Diagram |
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Consider the following graph.

 
At 1400 oC, the \(\Delta G_{r}^{o}\) the value for the reaction 
2FeO + 2C → 2Fe + CO is

1. -116 kJ mol-1
2. -106 kJ mol-1
3. 100 kJ mol-1
4. -100 kJ mol-1

Subtopic:  Ellingham Diagram |
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